i need to factor 1/2y-5 1/2 and i can't seem to get it

Answers

Answer 1

The factored form of the equation is 1/2(y - √5)

To factor this expression, we need to look for any common factors that can be pulled out of both terms. We can see that both terms contain a factor of 1/2, so we can factor that out:

1/2(y - 5 1/2)

Now we need to see if there are any further factors that we can find. The term inside the parentheses, y - 5 1/2, cannot be factored any further using real numbers. However, we can write the expression as y - √5, which shows that it involves the square root of 5.

So the final factored form of the expression is:

1/2(y - √5)

This means that if we multiply 1/2 by (y - √5), we get back the original expression 1/2y - 5 1/2.

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Related Questions

Kareem rented a truck for one day. there was a base fee of $19.99 , and there was an additional charge of 83 cents for each mile driven. kareem had to pay $135.36 when he returned the truck. for how many miles did he drive the truck?

Answers

Kareem drove the truck for 150 miles.

As areem rented a truck for one day. there was a base fee of $19.99 , and there was an additional charge of 83 cents for each mile driven we will let the number of miles driven by Kareem be represented by 'x'. The total cost, including the base fee, can be represented as:

Total cost = Base fee + Additional charge per mile * Number of miles driven

$135.36 = $19.99 + $0.83x

Subtracting $19.99 from both sides and then dividing by $0.83, we get:

x = (135.36 - 19.99) / 0.83

x = 150

Therefore, Kareem drove the truck for 150 miles.

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Which graph represents a function

Answers

The graph that represents a function is the graph (b)

Determine which graph does represent a function

From the question, we have the following parameters that can be used in our computation:

Graphs A to D

As a general rule of the vertical line test

For a graph to represent a function, a line drawn from the x-axis must intersect with the graph at most once

Using the above as a guide, we have the following:

The graph b would intersect with a line from the x-axis at most once

Hence, the graph that represents a function is (b)

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the table shows the outputs for several inputs. use two methods to find the output for an imput of 200
imputs: 0 1 2 3 4
outputs: 25 30 35 40 45

Answers

Answer:

Method 1 (Using Slope-Intercept Form):

First, we need to find the equation of the line that passes through the given points.

Slope (m) = (Change in y) / (Change in x) = (45 - 25) / (4 - 0) = 20 / 4 = 5

Using the slope and one point (0, 25), we can find the y-intercept:

y - y1 = m(x - x1)

y - 25 = 5(x - 0)

y = 5x + 25

Therefore, when the input is 200, the output would be:

y = 5(200) + 25

y = 1025

Method 2 (Using Linear Interpolation):

We can use the formula for linear interpolation:

y = y1 + ((x - x1) / (x2 - x1)) * (y2 - y1)

where:

x1 = 0, y1 = 25

x2 = 4, y2 = 45

x = 200

Substituting the values, we get:

y = 25 + ((200 - 0) / (4 - 0)) * (45 - 25)

y = 25 + (200 / 4) * 20

y = 25 + 500

y = 525

Therefore, when the input is 200, the output would be approximately 525.

Mrs. Logan's class is hiking. They increase their elevation by 100 ft every 2 min. What is the rate of their climbing?


A 10ftminftmin


B 50ftminftmin


C 100ftminftmin


D 200ftmin

Answers

The correct answer to this question is C, 100ft/min.

The rate of climbing can be calculated by dividing the increase in elevation (100 ft) by the time it takes to make that increase (2 min).

This gives a rate of 50ft/min. Therefore, the class is climbing at a rate of 100ft/min since the question asks for the rate of their climbing.

It's important to pay attention to the wording of the question to ensure that the correct answer is selected. In this case, the question specifically asks for the rate of climbing, not the rate of increase in elevation.

Always read the question carefully and make sure to include all given information when solving problems with content loaded.

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Please help!!! Find the total surface area of the following cone. Leave your answer in terms of pi.
4 cm
3 cm
SA = [?]π cm²

Answers

Answer:

24π cm²

Concepts Applied:

SA (TSA) of a cone = π · r · ( l+r )

Relation between l, h, and r i.e. l²=h²+r²

(h: cone height, r: base radius, l: slant height)

Step-by-step explanation:

Calculating the Slant height:

l²=h²+r²

l = sqrt(h²+r²)

l = sqrt(16+9)

l = sqrt(25)

l = +5 cm (distance is a scalar quantity)

Calculating the TSA:

= π · 3 · (5+3)

= 24π cm²

Answer:

34π cm^2 is the correct answer

h(x)=−(x+11) +1 What are the zeros of the function? What is the vertex of the parabola?

Answers

Answer:

x = -10 (zeros), vertex = infinity..?

Step-by-step explanation:

The graph is a straight line, not a parabola. I would assume the vertex would be infinity, and the zeros would be x = -10.

Your doing practice 6

Answers

Answer:

A ∪ B = {1, 2, 3, 4, 5, 6, 7, 9}

Step-by-step explanation:

We can find the union of two sets by including all of the numbers in both sets, but without repeating any numbers.

For example:

if A = {1, 2, 3, 4, 5} and B = {4, 5, 6, 7, 8},

then A ∪ B = {1, 2, 3, 4, 5, 6, 7, 8}

We can apply this concept to the problem at hand, but first we need to represent set A as a list of numbers:

They all have to be odd numbers between 0 and 10.

    [tex]\implies A[/tex] = {1, 3, 5, 7, 9}

We are given that B = {2, 3, 4, 5, 6}. So, to find the union of A and B, we can combine both sets of numbers and get rid of copies:

A ∪ B = {1, 2, 3, 4, 5, 6, 7, 9}

6. Kenard worked at a sporting goods store. To determine trends in footwear, he charted sales for a year. Then he constructed a circle graph of the data. The sales in March were double the sales in May. If the central angle in the graph for March measured 47.5°, what percent of the sales occurred in May?​

Answers

The percent of sales that occurred in May is: 6.6%

How to find the percentage of sale?

If the sales in March were double the sales in May, and the central angle in the graph for March measured 47.5°, we can find the central angle for May as follows:

Let x be the central angle for May. Then we have:

2x = 47.5

Solving for x, we get:

x = 23.75

So the central angle for May is 23.75°.

To find the percent of sales that occurred in May, we need to calculate the ratio of the central angle for May to the total central angle of the circle graph, and then multiply by 100. The total central angle of a circle is always 360°.

So the percent of sales that occurred in May is:

(23.75/360) x 100 = 6.6%

Therefore, 6.6% of the sales occurred in May.

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Hunter needs 12 ounces of a snack mix that is made up of seeds and dried fruit. The seeds cost $1.50 per ounce, and died fruit costs $2.50 per ounce. Hunter has $22 to spend and plans to spend it all.

Let x = the amount of seeds

Let y = the amount of dried fruit

Part 1: Create a system of eqution to represent the senario.

Part 2: Solve your system using any method (Desmos, Linear combination, or subsitution). Write your answer as an orderd pair.

Answers

Answer: (18, 4)

Part 1:

The cost of seeds and dried fruit together is $22:

1.5x + 2.5y = 22

Hunter plans to spend all of his money on seeds and dried fruit:

x + y = 22

Part 2:

We can use substitution method to solve the system of equations:

x = 22 - y   (from the second equation)

1.5(22 - y) + 2.5y = 22   (substitute x into the first equation)

33 - 1.5y + 2.5y = 22

y = 4

Substituting y = 4 into x + y = 22, we get x = 18.

Therefore, the ordered pair representing the number of seeds and dried fruit that Hunter bought is (18, 4).

Part 1:

We are given that Hunter needs 12 ounces of snack mix made up of seeds and dried fruit, and has $22 to spend. Let x be the amount of seeds (in ounces) and y be the amount of dried fruit (in ounces).

The total amount of snack mix is 12 ounces, so we have:

x + y = 12

The cost of the snack mix is $22, and the cost per ounce of seeds and dried fruit are $1.50 and $2.50, respectively. Therefore, we have:

1.5x + 2.5y = 22

This gives us a system of two equations:

x + y = 12

1.5x + 2.5y = 22

Part 2:

We can solve this system using substitution. Rearranging the first equation, we have:

x = 12 - y

Substituting this expression for x into the second equation, we get:

1.5(12 - y) + 2.5y = 22

Expanding and simplifying, we get:

18 - 1.5y + 2.5y = 22

y = 4

Substituting this value of y into the expression for x, we get:

x = 12 - y = 12 - 4 = 8

Therefore, Hunter needs 8 ounces of seeds and 4 ounces of dried fruit to make 12 ounces of snack mix, and will spend $1.50(8) + $2.50(4) = $20 on the snack mix.

As an ordered pair, the solution is (8,4).

Which TWO statements represent the relationship between y = 5x and y = log5 x The are the exponential and logarithmic form of the same equation They are symmetrix over the line y=0 They are symmetric over the line y=x They are inverses of one another​

Answers

The TWO statements that represent the relationship between y = 5x and y = log5 x are:

1. They are the exponential and logarithmic form of the same equation.

2. They are inverses of one another.

The two equations are related because they represent the same relationship between x and y, but in different forms. The first equation is an exponential equation, where y is a power of 5 raised to the x power. The second equation is a logarithmic equation, where y is the exponent to which 5 must be raised to get x.

Because the two equations represent the same relationship, they are inverses of one another. If we take the logarithm of both sides of the exponential equation, we get the logarithmic equation. If we raise 5 to both sides of the logarithmic equation, we get the exponential equation. Therefore, the two equations are inverses of one another.

The TWO statements that represent the relationship between y = 5x and y = log5 x are:

1. They are the exponential and logarithmic form of the same equation.
2. They are inverses of one another.

Explanation:
The equation y = 5x is an exponential equation, while y = log5 x is a logarithmic equation. These two equations are related in that they are inverse functions of each other. In other words, if we take the logarithm of both sides of the exponential equation, we get:

log5 y = log5 5x

Using the logarithmic identity loga b^c = c loga b, we can simplify this to:

log5 y = x log5 5

Since log5 5 = 1, this further simplifies to:

log5 y = x

In other words, y = log5 x is the inverse function of y = 5x. This means that if we plug in a value for x into one equation, we can find the corresponding value of y by plugging that value into the other equation.

Also, these two equations are symmetric over the line y = x. This means that if we graph each equation on the same coordinate plane, the line y = x will be the line of symmetry for the two graphs.

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Abdul flips a weighted coin 64 times and gets 16 tails. Based on experimental probability, how many of the next 40 flips should Abdul expect to come up tails?

Answers

Based on experimental probability, Abdul should expect 10 tails in the next 40 flips.

The experimental probability of getting tails is calculated as the ratio of the number of tails obtained in the experiment to the total number of coin flips.

In this case, the experimental probability of getting tails is 16/64, which simplifies to 1/4 or 0.25.

This means that in the long run, we would expect approximately 25% of coin flips to result in tails.

To determine how many of the next 40 flips Abdul should expect to come up tails based on experimental probability,

we can multiply the experimental probability by the total number of flips.

Abdul should expect 0.25 × 40 = 10 tails in the next 40 flips.

Experimental probability of getting tails = Number of tails obtained / Total number of coin flips

Experimental probability of getting tails = 16/64

Experimental probability of getting tails = 0.25 or 25%

Expected number of tails in the next 40 flips = Experimental probability of getting tails × Total number of flips

Expected number of tails in the next 40 flips = 0.25×40 = 10 tails

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Find the radius of an eyebrow window with width 62.8 inches and height 18.5 inches

Answers

The radius of an eyebrow window with a width of 62.8 inches and a height of 18.5 inches is approximately 36.7 inches.

To find the radius of an eyebrow window, we first need to understand its shape. An eyebrow window is a type of arched window that has a curved shape similar to that of an eyebrow. The shape of an eyebrow window is created by a combination of a circular arc and a straight line.

To find the radius of an eyebrow window with a width of 62.8 inches and a height of 18.5 inches, we need to use some geometry formulas. The height of the eyebrow window represents the height of the circular arc, and the width represents the diameter of the circle.

The formula for the radius of a circle is r = d/2, where r is the radius and d is the diameter. To find the diameter, we divide the width by pi (3.14). So, the diameter is 62.8/3.14 = 20 inches.

The height of the circular arc is half of the width, which is 18.5/2 = 9.25 inches. To find the radius, we use the formula for the height of a circular arc, h = r(1-cos(a/2)), where h is the height, r is the radius, and a is the angle of the arc.

The angle of the arc can be found using trigonometry. The sine of half the angle is equal to the height divided by the radius. So, sin(a/2) = h/r. Solving for a, we get a = 2arcsin(h/r).

Plugging in the values, we get a = 2arcsin(9.25/r). To find the radius, we solve for r using a calculator or algebra. The radius is approximately 36.7 inches.

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You rent an apartment that costs $1600$1600 per month during the first year, but the rent is set to go up 12.5% per year. What would be the rent of the apartment during the 10th year of living in the apartment? Round to the nearest tenth (if necessary).

Answers

The rent of the apartment during the 10th year of living in the apartment would be $4940.79

To solve the problem, we need to use the formula for compound interest:

A = P * (1 + r/n)^(n*t)

where:

A is the final amount

P is the initial principal

r is the annual interest rate (as a decimal)

n is the number of times the interest is compounded per year

t is the number of years

In this case, the "principal" is the initial rent of $1600 per month, and the "interest rate" is the 12.5% increase per year. We want to find out the rent during the 10th year, so t = 10.

Let's plug in the values and solve for A:

A = 1600 * (1 + 0.125/12)^(12*10)

A = 1600 * (1.01042)^120

A = 1600 * 3.086

A = 4940.79

So the rent during the 10th year would be $4940.79 per month, rounded to the nearest tenth.

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You're arranging bouquets of flowers for a wedding. you have 240 roses and 168 lilies. what is the largest number of bouquets you can make where every bouquet is identical? o 1 bouquets , o 24 bouquets o 408 bouquets 0 40,320 bouquets

Answers

We can make 24 bouquets of flowers for a wedding, each with 10 roses and 7 lilies.

To determine the largest number of identical bouquets that can be made using 240 roses and 168 lilies, we need to find the greatest common factor (GCF) of these two numbers.

The prime factorization of 240 is 2^4 x 3 x 5, while the prime factorization of 168 is [tex]2^3 * 3 * 7[/tex]. To find the GCF, we can take the product of the common prime factors raised to the smallest exponent they appear in either number. Therefore, the GCF of 240 and 168 is [tex]2^3 * 3[/tex] = 24.

This means that we can make 24 identical bouquets using 240 roses and 168 lilies. To do so, we would use 10 roses and 7 lilies in each bouquet, since 10 and 7 are the largest numbers that divide both 240 and 168 without remainder, respectively. So, we can make 24 bouquets, each with 10 roses and 7 lilies.

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The following information pertains to Rainey Inc. For 2020. Jan. 1 Number of common share issued and outstanding, 200,000

Feb. 1 Number of new common shares issued, 8,000

July 31 100% common stock dividend

Dec. 31 Reported net income of $560,000


What is the company’s earnings per share reported in its financial statements for the year ended December 31, 2020?

Select one:

a. $1. 35

b. $1. 90

c. $1. 45

d. $1. 3

Answers

The company’s earnings per share reported in its financial statements for the year ended December 31, 2020 is $1.45. The correct option is c.


To calculate earnings per share, we need to take the company's net income and divide it by the weighted average number of shares outstanding during the year.

First, let's adjust for the stock dividend on July 31. Since the dividend was 100%, we can double the number of shares outstanding to 416,000:

Jan. 1: 200,000 shares
Feb. 1: 8,000 new shares
July 31: 200,000 shares doubled to 400,000 shares
Dec. 31: 416,000 shares

Next, we need to calculate the weighted average number of shares outstanding during the year. We can do this by taking the number of shares outstanding for each period and multiplying it by the number of months those shares were outstanding:

Jan. 1 to Jan. 31: 200,000 shares x 1 month = 200,000
Feb. 1 to July 31: (200,000 + 8,000) shares x 6 months = 1,248,000
Aug. 1 to Dec. 31: 416,000 shares x 5 months = 2,080,000

Total weighted average shares outstanding: 3,528,000

Finally, we can divide the net income of $560,000 by the weighted average shares outstanding of 3,528,000 to get earnings per share of $0.1585. Multiplying this by 9 (since there are 9 months of the year remaining after February 1) gives us earnings per share of $1.4265. Rounded to the nearest penny, the answer is $1.45.

Thus, The correct option is c.

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There are 5 different green balls and 7 different red balls to be arranged in a row. how many ways can be arranged if all the green balls are separated

Answers

There are 86,400 ways to arrange 5 different green balls and 7 different red balls in a row if all the green balls are separated.

If all the green balls are separated, we can think of the green balls as dividers that separate the red balls into groups. Since there are 5 green balls, there will be 6 groups of red balls. For example, if there are 7 red balls, the arrangement might look like this:

| R R R R R R R |

The "|" symbols represent the green balls. Each group of red balls is between two green balls.

To count the number of arrangements, we can think of each group of red balls as a box, and the green balls as dividers between the boxes.

We can arrange the 6 boxes in a row in 6! = 720 ways, and we can arrange the 5 green balls in the remaining 5 positions in 5! = 120 ways. Therefore, the number of arrangements is:

6! x 5! = 720 x 120 = 86,400

So ,there are 86,400 ways to arrange 5 different green balls and 7 different red balls in a row if all the green balls are separated.

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The figure is tangent to the circle at point U. Use the figure to answer the question.


Hint: See Lesson 3. 09: Tangents to Circles 2 > Learn > A Closer Look: Describe Secant and Tangent Segment Relationships > Slide 4 of 8. 4 points.



Suppose RS=8 in. And ST=4 in. Find the length of to the nearest tenth. Show your work.


1 point for the formula, 1 point for showing your steps, 1 point for the correct answer, and 1 point for correct units

Answers

We know that the length of TU to the nearest tenth is 6.9 in

The figure is tangent to the circle at point U. Using the information given in the figure, we can conclude that segment ST is tangent to the circle at point T.

To find the length of TU, we can use the formula for the length of a tangent segment from a point outside the circle:

TU^2 = TS x TR

We know that TS = ST = 4 in. To find TR, we can use the Pythagorean theorem:

TR^2 = RS^2 - TS^2
TR^2 = 8^2 - 4^2
TR^2 = 48
TR = sqrt(48)

Now we can substitute the values we have found into the first formula:

TU^2 = 4 x sqrt(48)
TU = sqrt(4 x sqrt(48))
TU ≈ 6.9 in.

Therefore, the length of TU to the nearest tenth is 6.9 in.

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Sketch the angle in standard form whose terminal side passes through the point (-5, 12). Find the exact value for each trigonometric function. ​

Answers

The exact value for each trigonometric function are -12/13, -5/13 and 12/5

To find the reference angle, we can use the properties of right triangles. We can draw a line from the point (-5, 12) to the x-axis to form a right triangle. The hypotenuse of the triangle is the distance from the point (-5, 12) to the origin, which is the square root of the sum of the squares of the x and y coordinates:

√((-5)² + 12²) = 13

The reference angle is the acute angle between the x-axis and the adjacent side of the triangle, which is the x-coordinate of the point (-5, 12) divided by the hypotenuse:

cosθ = -5/13

θ = arccos(-5/13)

θ ≈ 2.214 radians

The angle's standard form is given by the equation:

θ = n(2π) ± α

where n is an integer, and α is the angle's reference angle. Since the point (-5, 12) is in the second quadrant, the angle's terminal side intersects the unit circle at an angle of θ = π + α. Therefore, the standard form of the angle is:

θ = (2n + 1)π - arccos(-5/13)

To find the exact value of the trigonometric functions of this angle, we can use the properties of the unit circle. Since the sine function is positive in the second quadrant, we have:

sinθ = sin(π + α) = -sinα = -12/13

Similarly, since the cosine function is negative in the second quadrant, we have:

cosθ = cos(π + α) = -cosα = -5/13

Finally, since the tangent function is the ratio of the sine and cosine functions, we have:

tanθ = tan(π + α) = -tanα = 12/5

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A bag of marbles contains 5 red, 3 blue, and 12 yellow marbles. Predict the


number of times Hazel will select a blue marble out of 500 trials.

Answers

In a bag containing 5 red, 3 blue, and 12 yellow marbles, we will predict the number of times Hazel will select a blue marble out of 500 trials.

Step 1: Calculate the total number of marbles in the bag:
Total marbles = 5 red + 3 blue + 12 yellow = 20 marbles

Step 2: Determine the probability of selecting a blue marble:
Probability of selecting a blue marble = (number of blue marbles) / (total marbles) = 3 blue / 20 marbles = 3/20

Step 3: Predict the number of times Hazel will select a blue marble in 500 trials:
Predicted blue marbles selected = (probability of selecting a blue marble) x (total trials) = (3/20) x 500

Step 4: Perform the calculation:
(3/20) x 500 = 75

In conclusion, we predict that Hazel will select a blue marble 75 times out of 500 trials, given that the bag contains 5 red, 3 blue, and 12 yellow marbles.

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Find the values of x for which the series converges. (Enter your answer using interval notation.)
∑(6)^nx^n

Answers

the series converges for x in the interval: (-1/6, 1/6)

The series ∑(6)^nx^n converges if |x| < 1/6. This can be determined using the ratio test, where we take the limit as n approaches infinity of the absolute value of the ratio of the (n+1)th term to the nth term:

|6(x^(n+1))/(x^n)| = 6|x|

As n approaches infinity, this limit is less than 1 if and only if |x| < 1/6. Therefore, the series converges for all x in the open interval (-1/6, 1/6).

In interval notation, we can write the answer as: (-1/6, 1/6).
The given series is:

∑(6^n)(x^n)

This is a geometric series with a common ratio of 6x. For a geometric series to converge, the absolute value of the common ratio must be less than 1:

|6x| < 1

To find the values of x for which the series converges, we can solve for x in the inequality:

-1 < 6x < 1

Divide by 6:

-1/6 < x < 1/6

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Determine the equation of the circle graphed below

Answers

Answer:

(x-6)^2+(y-4)^2=10

Step-by-step explanation:

use the equation of a circle ( x- x coordinate of center)^2+(y-y coordinate of the center)^2=radius squared.

to solve for the radius, make a right triangle from the center to the point on the circle. 1^2+3^2=r^2. So r^2 is 10

You can get the maximum points for answering this question. Please include your work.

Answers

a. True, more than 5% of the children selected "other".

b. True, 15% of kids say that Lucky Charms is their favourite cereal.

c. As the cereal that the most students chose, Frosted Flakes, it is true that this is the most popular cereal.

d. Fruit Loops were picked half as frequently as Frosted Flakes.

How to calculate Number of children?

Using Percentage calcuate number of children:

Total number of children = 15 + 10 + 2 + 20 + 3 = 50

a). 3 children chose other.

Percentage = 3/50 × 100

= 6%

So it's accurate to say that more than 5% of the kids selected "other".

b). 15 children chose "lucky charm".

Percentage = 15/50 × 100

= 30%.

So it is true that 15% of kids prefer Lucky Charms cereal.

c). Frosted Flakes are the cereal that the majority of pupils choose, so it is true that this is the case.

d). Ten kids all chose Fruit Loops.

Twenty kids chose Frosted Flakes.

As a result, Frosted Flakes were picked twice as often as Fruit Loops.

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Lab tests of a new drug indicate a 70% success rate in completely curing the targeted disease. The doctors at the lab created the random data in the table using a representative simulation. The letter E stands for "effective," and N stands for "not effective. " (TL;DR: Each E stands for 'effective' and each N stands for 'not effective'. You need to calculate the ratio of Es to Ns in percentage. )

EEEE NEEE EEEE EEEN NEEN NEEE EENE NNNE NEEN EENE NENE EEEE EEEE NNNE ENEE NEEN ENEE EENN ENNE NEEE ENEN EEEE EEEN NEEE EENN EENE EEEN EEEE EENE EEEE ENEE ENNN EENE EEEE EEEN NEEE ENEE NEEE EEEE EEEE NENN EENN NNNN EEEE EEEE ENNN NENN NEEN ENEE EENE

The estimated probability that it will take at least five patients to find one patient on whom the medicine would not be effective is [blank]. The estimated probability that the medicine will be effective on exactly three out of four randomly selected patients is [blank]

Answers

a.  The ratio of Es to Ns in percentage is 64%

b. Probability that it will take at least five patients to find one patient on whom the medicine would not be effective is impossible to estimate this probability from the table.

c. The probability that the medicine will be effective on exactly three out of four randomly selected patients is  12.9%

a. The total number of patients in the table is 50.

To calculate the ratio of Es to Ns in percentage, we count the number of Es and Ns and divide the number of Es by the number of Ns and Es combined, and then multiply by 100. Counting the table, we find that there are 32 Es and 18 Ns. So, the ratio of Es to Ns in percentage is:

32 / (32 + 18) * 100 = 64%

b. To estimate the probability that it will take at least five patients to find one patient on whom the medicine would not be effective, we need to look at the runs of Ns in the table. We can see that there are no runs of five or more Ns, so it is impossible to estimate this probability from the table.

c. To estimate the probability that the medicine will be effective on exactly three out of four randomly selected patients, we need to count the number of ways we can choose three Es and one N, and divide by the total number of possible outcomes of selecting four patients from the table. The total number of possible outcomes is:

50 choose 4 = 50! / (4! * (50-4)!) = 230300

The number of ways we can choose three Es and one N is:

32 choose 3 * 18 choose 1 = (32! / (3! * (32-3)!)) * (18! / (1! * (18-1)!)) = 32 * 31 * 30 / (3 * 2) * 18 = 32 * 31 * 30 * 18 / 6 = 297120

So, the estimated probability that the medicine will be effective on exactly three out of four randomly selected patients is:

297120 / 230300 ≈ 0.129 or about 12.9% (rounded to the nearest tenth of a percent).

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Annmarie can plow a field in 240 minutes. Gladys can plow a field 80 minutes faster. If they work together, how many minutes does it take them to plow the field?

Answers

It would take Annmarie and Gladys 96 minutes to plow the field together.

How long to plow field together?

Annmarie can plow a field in 240 minutes. Gladys can plow the same field 80 minutes faster than Annmarie.

So Gladys can plow the field in 240 - 80 = 160 minutes.

Let x be the time it takes for both of them to plow the field together.

The combined rate of Annmarie and Gladys is the sum of their individual rates.

Annmarie's rate is 1 field per 240 minutes, which is 1/240 field per minute.

Gladys's rate is 1 field per 160 minutes, which is 1/160 field per minute.

Their combined rate is:

1/240 + 1/160 = 1/x

Simplifying this equation:

1/x = (4/960) + (6/960) = 10/960

1/x = 1/96

Multiplying both sides by 96, we get:

x = 96 minutes

Therefore, it would take Annmarie and Gladys 96 minutes to plow the field together.

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The volume of the cylinder displayed is approximately 9. 4 cubic feet. What is the approximate volume for a cone with the same height and radius? Whats the answer

Answers

The volume of the cone is approximately one-third the volume of the

cylinder

:V(cone) ≈ 1/3 V(cylinder) = 1/3 (9.4) ≈ 3.1 cubic feet.

The volume of a cone with the same height and radius as the given

cylinder, we can use the formula:

[tex]V = 1/3 πr²h[/tex]

where V is the volume, r is the radius, and h is the height.

Since the cylinder has a volume of approximately 9.4 cubic feet, we can

use the formula for the volume of a cylinder

:V = πr²hand solve for the radius:

[tex]r = √(V/πh) = √(9.4/πh)[/tex]

Now we can substitute this expression for the radius into the formula for

the volume of a cone:

[tex]V = 1/3 π(√(V/πh))²h[/tex]

Simplifying this expression gives:

[tex]V = 1/3 π(V/πh)hV = 1/3 V[/tex]

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In January, 280 guests at a hotel chose to use the valet service to park their cars during their stay. At the same time, 120 guests chose to use a public parking garage for their cars during their stay. What percentage of the guests at this hotel used the valet service?

Answers

70 percent of the guests at this hotel used the valet service.

To find the percentage of guests who used the valet service, we can follow these steps:

1. Add the number of guests who used the valet service (280) and those who used the public parking garage (120) to find the total number of guests with cars: 280 + 120 = 400 guests.

2. Divide the number of guests who used the valet service (280) by the total number of guests with cars (400).

3. Multiply the result by 100 to convert it into a percentage.

So, let's calculate the percentage:

(280 / 400) * 100 = 0.7 * 100 = 70%

Thus, 70% of the guests at this hotel used the valet service.

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Can someone please help me ASAP? It’s due tomorrow

Answers

The answer is 15 this is because I did math to answer it by using my brain

The end of a car tunnel has the shape
of a semi-circle on top of a rectangle.
The tunnel is exactly 4 km long.
a) Calculate the volume of air in the
tunnel with no cars in it.
b) The air in a car tunnel must be
exchanged frequently. If the exhaust
system pumps the air out at a rate of
10 m3
per second, how long does it
take to replace the stale air with fresh
air in the entire tunnel? Give your
answer in hours and minutes.

Answers

Answer:

  a) 149,270 m³

  b) 4 hours 9 minutes

Step-by-step explanation:

You want to know the volume of air in a 4 km tunnel 8 m high and 5 m wide with a semicircular cross section at the top. And you want to know the replacement time for that air if it is exchanged at 10 m³ per second.

Area

The area of the semicircular top of the tunnel is ...

  A = π/8d²

  A = π/8·(5 m)² = 25π/8 m²

The area of the rectangular bottom of the tunnel is ...

  A = LW

  A = (5 m)(8 -2.5 m) = 27.5 m²

So the total cross sectional area of the tunnels is ...

  (25π/8 +27.5) m² ≈ 37.317477 m²

a) Volume

The volume of the tunnel is ...

  V = Bh

  V = (37.317477 m²)(4000 m) ≈ 149269.9 m³

The volume of the air in the tunnel is about 149269.9 m³.

b) Exchange time

At 10 m³ per second, the air will be replaced after ...

  (149269.9 m³)/(10 m³/s) = 14926.99 s ≈ 4 hours 9 minutes

The given pump takes 4 hours 9 minutes to replace the air in the entire tunnel.

__

Additional comment

This tunnel would not meet any standard of safety.

A typical building is supposed to have about 5 air exchanges per hour. That's about 21 times the rate given here. Some tunnel structures need to have the air exchanged once per minute. (Here, that would mean the wind in the tunnel is 149 mph.)

The breathing requirements of the tunnel occupants need to be considered, as well as removal of air pollutants.

There are 3600 seconds in 1 hour.

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Which equation can be solved to find one of the missing side lengths in the triangle?

Triangle A B C is shown. Angle A C B is 90 degrees and angle C B A is 60 degrees. The length of side C B is a, the length of C A is b, and the length of hypotenuse A B is 12 units.

cos(60o) = StartFraction 12 Over a EndFraction
cos(60o) = StartFraction 12 Over b EndFraction
cos(60o) = StartFraction b Over a EndFraction
cos(60o) = StartFraction a Over 12 EndFraction
Mark this and return

Answers

The fourth equation i.e. cos (60°) = [tex]\frac{a}{12}[/tex] can be used to find one of the missing side lengths in the triangle. This has been obtained using trigonometry.

What is trigonometry?

Trigonometry is a branch of mathematics that focuses on right-angled triangles, including their sides, angles, and connections.

We are given a right angled triangle with perpendicular as b, base as a and hypotenuse measuring 12 units.

We know by trigonometry that cos θ is the proportion of the adjacent side to the hypotenuse.

So, only the fourth equation is the one which can be used to find the missing length.

So, the equation is cos(60°) = [tex]\frac{a}{12}[/tex].

Hence, the fourth option is the correct answer.

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Arnold is looking at the building from 300 feet away at an angle of elevation of 22 grades when asked arnold says he’s 4.75 feet tall do you agree or desagree with arnold’s height explain your answer with matemátical support?

Answers

We can conclude that Arnold's height of 4.75 feet by using tangent function is not accurate based on the calculations.

To determine whether Arnold's height is accurate, we can use trigonometry and the given information about the angle of elevation and distance to the building.

Let's start by drawing a diagram to represent the situation. We have a right triangle with the opposite side being Arnold's height (h), the adjacent side being the distance to the building (300 ft), and the angle of elevation being 22 degrees.

Using the tangent function, we can write:

tan(22) = h / 300

Solving for h, we get:

h = 300 * tan(22)

Using a calculator, we find that h is approximately 122.8 feet.

Therefore, we can conclude that Arnold's height of 4.75 feet is not accurate based on the calculations. The height we calculated is over 25 times greater than Arnold's claimed height, which is not possible.

It is important to note that this assumes that Arnold's line of sight is parallel to the ground. If Arnold is on uneven ground, this could affect the calculations. Additionally, it is possible that Arnold may have misspoken about his height or the angle of elevation. However, based on the given information and calculations, we can confidently say that Arnold's claimed height is not accurate.

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