From the discrete distribution given, the standard deviation is of 0.83 children.
How to solveThe distribution is:
P(X=1) =0.5
P(X=2) =0.25
P(X=3) =0.25
The mean is 1.75.
The standard deviation is the square root of the sum of the difference squared between each value and the mean, multiplied by it's respective probability.
Hence:
The standard deviation is 0.83 children.
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The service history of the Prego SUV is as follows: 50%will need no repairs during the first year, 35% will have re-pair costs of $500 during the first year, 12% will have repair costs of $1500 during the first year, and the remaining SUVs(the real lemons) will have repair costs of $4000 during their first year. Determine the price that the insurance company should charge for a one-year extended warranty on a Prego SUV if it wants to make an average profit of $50 per polic
The price that the insurance company should charge for a one-year extended warranty on a Prego SUV is $402.
To determine the price that the insurance company should charge for a one-year extended warranty on a Prego SUV, the company needs to calculate the expected value of the repair costs and then add their desired profit to it.
Let's assume that the price for the warranty is x dollars. Then, the expected value of the repair costs for the insurance company would be:
(0.50)(0) + (0.35)($500) + (0.12)($1500) + (0.03)($4000) = $352
This means that on average, the insurance company can expect to pay out $352 in repair costs for each policy sold. To make an average profit of $50 per policy, the insurance company should charge:
x = $352 + $50 = $402
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Suppose that 11,000 is invested in a bond fund and the account grows to 14,539.95 in 5 yr.
Answer:
Step-by-step explanation:
11000*14539.95
7.1483737364203627356954981215625 × 10^24
is the answer
The line plot shows a student's quiz scores. Which measures of center and variability should be used to describe the data?
Quiz Scores
0=1
1,2,3,4=0
5=2
6=4
7=2
8=2
9=1
10=0
The measures of center for this data set are the mean and median. The mean is 5.1 and median is 6.
The measure of variability is the range. The range is 10.
How to explain the informationThe measures of center describe the typical or central value of the data. For this data set, we can use the mean or the median as measures of center. The mean is the average of all the quiz scores, while the median is the middle value when the scores are arranged in order.
Mean = (0x1 + 1x0 + 2x0 + 3x0 + 4x0 + 5x2 + 6x4 + 7x2 + 8x2 + 9x1 + 10x0) / (1+0+0+0+0+2+4+2+2+1+0) = 5.1
Median = 6 (the middle score)
The measures of variability describe the spread or dispersion of the data. For this data set, we can use the range. The range will be:
= Highest score - Lowest score
= 10 - 0
= 10
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The line plot shows a student's quiz scores.
Quiz Scores
0 = 1
1,2,3,4 = 0
5 = 2
6 = 4
7 = 2
8 = 2
9 = 1
10 = 0
Which measures of center and variability should be used to describe the data?
Real Zeros of a Polynomial Function
The polynomial function of degree 3 with leading coefficient 1 and zeros at -5, 0, and 6 is f(x) = x³ - x² - 30x.
To find a polynomial function of degree 3 with leading coefficient 1 and zeros at -5, 0, and 6, we start by using the factor theorem. This theorem tells us that if a polynomial function has a zero at some value c, then it is divisible by the linear factor (x - c).
Therefore, the polynomial with zeros at -5, 0, and 6 can be written as:
f(x) = a(x + 5)(x - 0)(x - 6)
where a is a constant coefficient that we need to determine. Since the leading coefficient of the polynomial is 1, we set a = 1.
Multiplying out the factors, we get:
f(x) = (x + 5)(x)(x - 6)
= x³ - x² - 30x
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Please help !!!!!!!!!
Suppose that the number of dollars spent per week on groceries are normally distributed with an unknown mean and standard deviation. A random sample of 18 grocery bills is taken and gives a sample mean of 103 dollars and a sample standard deviation of 10 dollars.
The margin of error for a 98% confidence interval estimate for the population mean using the Student's t-distribution is 6.05. Find a 98% confidence interval estimate for the population mean using the Student's t-distribution.
Round the final answers to two decimal places.
We are given that the sample size $\sf\:n = 18$, sample mean $\sf\:\bar{X} = 103$, sample standard deviation $\sf\:S = 10$, and margin of error $\sf\:E = 6.05$ for a 98% confidence interval estimate for the population mean.
Using the formula for the margin of error, we can find the value of the t-score that corresponds to a 98% confidence level with 17 degrees of freedom (since we have 18 samples):
$\sf\:t_{0.01/2, 17} \implies 2.898$
Now, we can use the formula for a confidence interval estimate to find the lower and upper bounds of the interval:
$\sf\:\bar{X} - E \implies 103 - 6.05 < \mu < \bar{X} + E \implies 103 + 6.05$
Substituting in the values we have:
$\sf\:103 - 6.05 < \mu < 103 + 6.05$
Simplifying:
$\sf\leadsto\:96.95 < \mu < 109.05$
Therefore, a 98% confidence interval estimate for the population mean is $\sf\: (96.95, 109.05)$ rounded to two decimal places.
[tex]\begin{align}\colorbox{black}{\textcolor{white}{\underline{\underline{\sf{Please\: mark\: as\: brillinest !}}}}}\end{align}[/tex]
[tex]\textcolor{lime}{\small\textit{If you have any further questions, feel free to ask!}}[/tex]
[tex]{\bigstar{\underline{\underline{\sf{\color{red}{Sumit\:Roy}}}}}}{\bigstar}\\[/tex]
Eliza plans on constructing a confidence interval for the slope of a regression line. She creates the residual plot shown to check the conditions for creating the interval. Which of the following conditions appear to be met based on the residual plot?
I.The true relationship between x
and y
is linear.
II.The standard deviation of y
is constant for different levels of x
.
III.The value of 0 is contained in the confidence interval.
Answer:
Based on the residual plot, we can check for the following conditions:
I. The true relationship between x and y is linear:
We can check this condition by looking at the pattern of the residuals in the plot. If the residuals are randomly scattered around zero, without any discernible pattern, then it suggests that the true relationship between x and y is linear. If there is a pattern in the residuals, then it suggests that the true relationship is not linear. Since we are not given a residual plot to examine, we cannot determine whether this condition is met.
II. The standard deviation of y is constant for different levels of x:
We can check this condition by looking at the spread of the residuals in the plot. If the spread of the residuals is roughly the same for all values of x, then it suggests that the standard deviation of y is constant for different levels of x. If the spread of the residuals increases or decreases as x increases, then it suggests that the standard deviation of y is not constant for different levels of x. From the residual plot, we cannot determine whether this condition is met.
III. The value of 0 is contained in the confidence interval:
This condition refers to the confidence interval for the slope of the regression line. If the confidence interval includes 0, then it suggests that the slope is not significantly different from 0 and there is no significant linear relationship between x and y. From the residual plot, we cannot determine whether this condition is met.
Therefore, based on the given information, we cannot determine which conditions appear to be met based on the residual plot.
Write an inequality that matches the number line model. Then write
a situation that the inequality could represent.
25 is less than x
Joe bought a house for $370,000. The assessed value of
the house is $280,000. The property tax rate is 2.9%. What
is Joe's annual property tax bill for this house?
Answer: Joe's property tax bill is based on the assessed value of the house, not the purchase price.
To calculate his annual property tax bill, we first need to calculate the assessed value of the house that will be used to determine the tax. The assessed value is given as $280,000.
The annual property tax bill is then calculated as follows:
Tax bill = assessed value x tax rate
Tax bill = $280,000 x 0.029
Tax bill = $8,120
Therefore, Joe's annual property tax bill for this house is $8,120.
is 2^7 equal to 2x 7
Answer: No, 2^7 is not equal to 2x7.
2^7 means 2 raised to the power of 7, which is 2 multiplied by itself 7 times:
2^7 = 2 x 2 x 2 x 2 x 2 x 2 x 2 = 128
On the other hand, 2x7 means 2 multiplied by 7:
2x7 = 2 x 7 = 14
So 2^7 is not equal to 2x7.
Step-by-step explanation:
Answer:
No
Step-by-step explanation:
See, 2 ^ 7 is 2 TO THE POWER OF 7, which is repeated multiplication.
2 x 7 is 2 MULTIPLIED BY 7
2 ^ 7 written out completely is:
2 * 2 * 2 * 2 * 2 * 2 * 2 = 128
See the repeated multiplication above?
2 x 7 is just 14.
See the difference!
14 is NOT equal to 128
May I please have brainliest?
What is the circumference of the circle with a radius of 2.5 meters? Approximate using π = 3.14. 61.62 meters 19.63 meters 15.70 meters 7.85 meters
the circumference of the circle with a radius of [tex]2.5[/tex] meters, approximated using [tex]\pi = 3.14[/tex], is [tex]15.7[/tex] meters. Thus, option C is correct.
What is circumference?The circumference of a closed curved object, such a circle or an ellipse, is the length around its perimeter.
The circumference of a circle is the distance around its perimeter. [tex]C = 2r[/tex] , where r is the radius (the distance from the centre of the circle to any point on its border), and pi is a mathematical constant roughly equal to [tex]3.14159[/tex], is the formula for a circle's circumference.
The formula for the circumference of a circle is [tex]C = 2\pi r[/tex] , where r is the radius of the circle.
Substituting the given value of the radius, we get:
[tex]C = 2 \times 3.14 \times 2.5 = 15.7[/tex] meters (approx.)
Therefore, the circumference of the circle with a radius of [tex]2.5[/tex] meters, approximated using π = 3.14, is 15.7 meters.
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Vase A has height 10 cm. Vase B has height 15 cm. The difference between the volume of vase A and the volume of vase B is 1197 cm' Calculate the volume of vase A
The volume of vase A is given as follows:
504 cm³.
How to obtain the volume?The volume of vase A is obtained applying the proportions in the context of the problem.
Vase A has height 10 cm. Vase B has height 15 cm, hence the ratio between the heights is given as follows:
[tex]\frac{h_B}{h_A}[/tex] = 15/10
[tex]\frac{h_B}{h_A}[/tex] = 1.5.
The heights are given in units, while the volumes are given in cubic units, hence the rate between the volumes is given as follows:
[tex]\frac{vB}{vA}[/tex] = 1.5³
[tex]\frac{vB}{vA}[/tex]= 3.375
[tex]v_B = 3.375v_A[/tex].
The difference between the volume of vase A and the volume of vase B is 1197 cm³, hence:
[tex]v_B - v_A = 1197[/tex]
[tex]3.375v_A - v_A = 1197[/tex]
[tex]v_A = 1197/2.375[/tex]
[tex]v_A[/tex] = 504 cm³.
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AquaWorks is training new employees to assemble hot water heaters. The
number of water heaters h that a trainee can assemble per 8-hour shift is given
by h = 2.1 0.9t + 4 where t is the number of days of training the trainee
has received. How many training days are required before a trainee can
assemble 9 heaters? Round up to the nearest day.
Answer:
A trainee requires 3 days of training before they can assemble 9 heaters.
Step-by-step explanation:
We are given the formula for the number of water heaters h that a trainee can assemble per 8-hour shift as:
h = 2.1 0.9t + 4
where t is the number of days of training the trainee has received. We need to find out how many training days are required before a trainee can assemble 9 heaters. So we set h to 9 and solve for t:
9 = 2.1 0.9t + 4
Subtracting 4 from both sides, we get:
5 = 2.1 0.9t
Dividing both sides by 2.1 0.9, we get:
t = (5 / (2.1 0.9))
Using a calculator, we get:
t ≈ 2.49
Rounding up to the nearest day, we get:
t = 3
Therefore, a trainee requires 3 days of training before they can assemble 9 heaters.
use synthetic division
PLEASE HELP!!
The quotient using a synthetic method of division is 8x² + 15x + 7/8 and the remainder is 71/64
How to evaluate the quotient using a synthetic methodThe quotient expression is given as
(8x³ + 14x² - 2x + 1) divided by x - 1/8
Using a synthetic method of quotient, we have the following set up
1/8 | 8 14 -2 1
|__________
Bring down the first coefficient, which is 8:
1/8 | 8 14 -2 1
|__________
8
Multiply 8 by 1/8 to get 1, and write it below the next coefficient and repeat the process
1/8 | 8 14 -2 1
|_____1_15/8__7/64_
8 15 7/8 71/64
So, the quotient is 8x² + 15x + 7/8 and the remainder is 71/64
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Math question sb please do ts giving branliest
Answer:
All lines are parallel
Step-by-step explanation:
Get each equation in Slope-Intercept form:
1. Divide both sides by 3: [tex]y=-\frac{4}{3}x+\frac{7}{3}[/tex]
2. No change
3. Subtract 8x and divide by 6 on both sides: [tex]y=-\frac{4}{3}x-\frac{2}{3}[/tex]
Notice:
a. All slopes are -4/3, AND
b. All y-intercepts are different
What is the value of |6| - | -6|-(-6)
Step-by-step explanation:
|6| - | -6|-(-6) =
6 - 6 +6 = 6
At 12.30 p.m, a car overtook a van along an expressway. The car and the van were travelling at
average speeds of 90Km/h and 70 Km/h respectively. After 1/2 hour the speed of the car
was reduced by 10 km/h. How far apart were the two vehicles at 2 .00 p.m?
crack the code
09, 15. 18. 20, 22, 25, 03
The next number in the sequence would be 25 + 4 = 29.
How to break the sequence?
First off, we rearrange these numbers in ascending order and this gives us:
3 9 15 18 20 22 25
Next, we try and find the pattern:
The pattern seems to be adding consecutive odd numbers starting from 3.
3 + 6 = 9
9 + 6 = 15
15 + 3 = 18
18 + 2 = 20
20 + 2 = 22
22 + 3 = 25
Therefore, the next number in the sequence would be 25 + 4 = 29.
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crack the code
09, 15. 18. 20, 22, 25, 03
Find the next number
4. The arithmetic mean of a data set is the measure of center is ….
A) that is found by adding the data values and dividing the total by the number of data values
B)that is the value midway between the maximum and minimum values in the original data set
C)that is the middle value when the original data values are arranged in order of increasing (or decreasing) magnitude
D) that is the value that occurs with the greatest frequency
The correct statement is A) that is found by adding the data values and dividing the total by the number of data values
What is meant by adding?
Adding is an operation in which two or more numbers or quantities are combined to obtain a sum. It is represented by the symbol "+" and is one of the four basic arithmetic operations.
What is meant by dividing?
Dividing is an operation that separates a quantity or a number into equal parts or groups. It is represented by the symbol "÷" or "/" and is one of the four basic arithmetic operations.
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The engine in a ice cream truck has a power curve approximated by Y=-X^2/5000 + 19x/23 -26
X is the RPM, Y is the horsepower generated (notice the a and b values are fractions)
What is the maximum horsepower? Round your answer to three decimal places.
The maximum horsepower of the ice cream truck engine is 827.025.
How to find the maximum horsepower?For quadratic equation y = ax² + bx + c, the maximum value of y is given by:
y(max) = c- b²/4a
Since the horsepower generated by the ice cream truck engine power curve is approximated by Y = -X²/5000 + 19x/23 -26
In this case, a = -1/5000, b = 19/23 and c = -26
Thus, the maximum horsepower will be:
maximum horsepower = -26 - (19/23)²/[4*(-1/5000)]
maximum horsepower = 827.025 horsepower
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Harvey’s pizzeria has three pizza sizes he wants to work out the outside measurement (circumference) of each size to work out how much cheese he will need for a stuff crust.
Match the correct circumference of each pizza using the diameter given.
Small –
Medium-
Large-
The circumference of the small pizza is approximately 47.1 cm, the circumference of the medium pizza is approximately 69.1 cm, and the circumference of the large pizza is approximately 94.2 cm.
The diameter is the distance across the widest part of a circle. To find the circumference of a circle, we use the formula C = πd, where C is the circumference, π is a mathematical constant (approximated as 3.14), and d is the diameter of the circle. Therefore, to find the circumference of each pizza size, we can simply plug in the given diameter into this formula.
For the small pizza with a diameter of 15 cm, the circumference can be calculated as follows:
C = πd
C = 3.14 x 15
C ≈ 47.1 cm
For the medium pizza with a diameter of 22 cm, the circumference can be calculated as follows:
C = πd
C = 3.14 x 22
C ≈ 69.1 cm
For the large pizza with a diameter of 30 cm, the circumference can be calculated as follows:
C = πd
C = 3.14 x 30
C ≈ 94.2 cm
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MN=3X+2 AND NP=X+4 WHAT IS THE VALUE OF X
Answer:
N = M + 10/3P
Step-by-step explanation:
According to the graph, what is the value of the constant in the equation
below?
A. 1
B. 2
C. 0.5
D. 4
IF THERE ARE 12 RUNNERS IN A RACE, AND 3 RUNNERS ARE RANDOMLY CHOSEN OUT OF THE 12 FOR DRUG TESTING, HOW MANY DIFFERENT WAYS CAN THESE 3 BE CHOSEN?
we need combination formula:
[tex] \frac{nı}{(n - r)ı \times rı} [/tex]
"I means !"
so the answer is:
12!/9! × 3! = 440
QUESTION 1
Joe's Pizza Company faces a demand for its pizzas which obeys the "law of demand." This means if Joe lowers the price he charges
per pizza
His profit will rise.
He will sell more pizzas.
His profit will fall.
He will sell fewer pizzas.
If Joe lowers the price he charges per pizza, he will sell more pizzas. option B
Why would he sell more?To sell more pizza, Joe must decrease the price he charges per unit. The law of demand dictates that when a product's cost decreases, its quantity demanded rises resulting in an increased sales volume.
It follows then that if Joe reduces his pizza prices more people will be inclined to purchase it creating this increase in sales . Nonetheless, whether Joe’s profit will rise or diminish depends on the extent of the rise in sales compared to the lowering of the price.
Even if there is a reduction in the price of every pizza, if the resultant sales volume is significant enough, Joe’s profit margin could still experience a positive turn.
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A straw is placed inside a rectangular box that is g inches by 6 inches by 7 inches, as shown. If the straw fits exactly into the box diagonally from the bottom left corner to the top right back corner, how long is the straw? Leave your answer in simplest radical form.
Answer:
The length of the straw will be 5.91607 inches long in radical form.
What is Length of diagonal in cuboid?
If a cuboid has length = l units, breadth = b units, and height = h units, then we can evaluate the length of the diagonal of a cuboid using the formula
As per the question the length of the straw is equal to length of the diagonal of Rectangular box.
l= 3 inch , b= 5 inch , h= 1 inch
Let us consider the length of the straw be 'x'.
As, Diagonal of Cuboid is,
X= 5.91607 (in radical form)
Step-by-step explanation:
Hence, the length of the straw will be 5.91607 inches.
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7) If a professor can grade 5 essays in 40 minutes, the professor can grade 32 essays in 256 minutes. (10pts)
O True
O False
Answer:
O True
Step-by-step explanation:
Unit rate of essays/minute:
40 minutes / 5 essays = 8 essays/minute
256 essays / 32 minutes = 8 essays/minute
The unit rates are equal.
Answer: O True
2010 2008
$971 $812
$977 $943
$900 $873
$1071 $1023
$501 $486
2. What is the median weekly earnings of workers in the occupations listed for
2010?
The median weekly earnings of the data set of the workers in the occupations listed for 2010 is calculated as: $971.
How to Find the Median Weekly Earnings?To find the median weekly earnings for the occupations listed in 2010, we need to first arrange the earnings in order from least to greatest:
$501, $900, $971, $977, $1071
The median is the middle value in this ordered list. Since there are an odd number of values, the median is simply the middle value.
Therefore, the median weekly earnings of workers in the occupations listed for 2010 is $971.
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James takes a 150000 mortgage for 20 years and makes a monthly payment of 915.00. What percent of the total loan does he pay back in interest?
James pays back approximately 82.33% of the total loan in interest over the 20-year period.
To calculate the percentage of the total loan that James pays back in interest, we need to determine how much of the monthly payments go towards interest and how much goes towards paying down the principal.
Using a loan calculator or a formula, we can determine that the monthly interest rate for James' loan is approximately 0.35% (4.25% annual rate divided by 12 months). The monthly payment of $915.00 is comprised of both principal and interest.
In the first month, the interest portion of the payment would be $531.25 and the remaining $383.75 would go towards the principal. As the loan is paid down over time, the interest portion of each payment decreases while the principal portion increases.
To calculate the total interest paid over the life of the loan, we can multiply the monthly interest by the number of months (20 years x 12 months/year = 240 months) and subtract the original principal amount of $150,000. This gives us a total interest paid of approximately $123,500.
To find the percentage of the total loan that this represents, we can divide the total interest paid by the original principal and multiply by 100:
$123,500 ÷ $150,000 x 100 ≈ 82.33%
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Casey is going to wear a gray sportscoat and is trying to decide what tie he should wear to work. In his closet, he has 29 ties, 15 of which he feels go well with the sport coat. If Casey selects one tie at random, determine the probability and the odds of the tie going well or not going well with the sport coat.
The probability is P = 0.51, and the odds are 15 to 14.
How to determine the probability and the odds?If all the ties have the same probability of being randomly choosen, then the probability of randomly selecting a tie that goes well with the sports coat is equal to the quotient between the number of ties that goes well with the sports coat (15) and the total number of ties.
The probability will be:
P = 15/29 = 0.51
And the odds are the number of good ties to the number of the other ones, there are 15 good ones and 14 bad ones, so the odds are 15 to 14.
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