Answer:
[tex]X \sim N(200000,100000)[/tex]
Where [tex]\mu=200000[/tex] and [tex]\sigma=10000[/tex]
From the empirical rule we know that within one deviation from the mean we have 68% of the values so then 1 deviation above the mean we will have (100-68)/2 = 16% and then the number of houses that are greater than one deviation above the mean are:
[tex] Number = 1216*0.16 = 194.56[/tex]
And the answer woud be between 194 and 195 houses
Step-by-step explanation:
Let X the random variable that represent the value of homes in Hampton VA of a population, and for this case we know the distribution for X is given by:
[tex]X \sim N(200000,100000)[/tex]
Where [tex]\mu=200000[/tex] and [tex]\sigma=10000[/tex]
From the empirical rule we know that within one deviation from the mean we have 68% of the values so then 1 deviation above the mean we will have (100-68)/2 = 16% and then the number of houses that are greater than one deviation above the mean are:
[tex] Number = 1216*0.16 = 194.56[/tex]
And the answer woud be between 194 and 195 houses
The circumference of a circle is 15 pi centimeters what is the area of the circle in terms of pi
Answer:
[225(pi)]/4
Step-by-step explanation:
circumference = pi(diameter)
area = pi (radius)^2
Diameter = 2(radius)
15pi cm = pi(diameter)
divide both sides by pi
diameter = 15
radius = 7.5
Area = pi (7.5)^2
A = 56.25 pi
most teachers prefer fractions so
225pi/4
how much longer is a 1-inch button than a 3/8-inch button?
Answer:
5/8
Step-by-step explanation:
If you take 1/1 and subtract it by 3/8 you will get the answer 5/8
So the 1 inch button is 5/8 longer than the 3/8 button.
Answer:
5/8
Step-by-step explanation:
Please answer this correctly
Answer:
7.07
Step-by-step explanation:
The area of the whole circle is given by the formula ...
A = πr^2
For the given values, the area of the circle is ...
A = 3.14(3 in)^2 = 28.26 in^2
One-quarter of that area is ...
(28.26 in^2)/4 = 7.065 in^2
The area of the quarter-circle is about 7.07 square inches.
Answer:
[tex] = 7.065 {in}^{2} [/tex]
Step-by-step explanation:
[tex] area = \frac{90}{360} \times \pi {r}^{2} \\ \frac{1}{4} \times 3.14 \times 3 \times 3 \\ = \frac{28.26}{4} \\ = 7.065 \: \: {in}^{2} [/tex]
hope this helps
brainliest appreciated
good luck! have a nice day!
g(x) = 5x – 3, find g(-4).
Answer: -23
Step-by-step explanation: Let me know if you need an explanation.
Answer:
-23
Step-by-step explanation:
g(x) = 5x – 3
g(-4) means substitute -4 for x in the expression above.
Hence
g(-4) =5(-4) – 3 = -20-3 = -23
PLEASE HELP 20 POINTS + BRAINLIEST IF ANSWERED Which method correctly solves the equation using the distributive property? Negative 0.2 (x minus 4) = negative 1.7 Negative 0.2 (x minus 4) = negative 1.7. Negative 0.2 x minus 4 = negative 1.7. Negative 0.2 x = 2.3. x = negative 11.5. Negative 0.2 (x minus 4) = negative 1.7. x minus 4 = 0.34. x = 4.34. Negative 0.2 (x minus 4) = negative 1.7. Negative 0.2 x + 0.8 = negative 1.7. Negative 0.2 x = negative 2.5. x = 12.5. Negative 0.2 (x minus 4) = negative 1.7. Negative 0.2 x minus 0.8 = negative 1.7. Negative 0.2 x = negative 0.9. x = 4.5.
Answer:
i would say B
hope i could help
Answer:
B is the answer
Step-by-step explanation:
Will give brainliest!!!
Answer: D
Step-by-step explanation:
We can solve for k by plugging in the x-intercept. We know that the x-intercept is 4, therefore the y is 0. The coordinates would be (4,0). Now that we have our x and y, we can plug in and solve for k.
4k+2(0)+8=0
4k+0+8=0
4k+8=0
4k=-8
k=-2
A stem and leaf plot shows data in _____ order.
alphabetical
numerical
reverse
Answer:
Numerical
because numerical order is an arrangement of a series of items by numbers in a sequential order.
Lila flies a drone in the direction of 90° towards Avery. Once she gets to Avery she changes course and flies in the direction of 200° towards Mark. Lila and Avery are 20 feet apart; Mark and Avery are 30 feet apart. How far apart are Mark and Lila?
Answer: 29.8ft
Step-by-step explanation:
suppose that the angles are measured from an x-axis.
we know that:
Lila and Avery are 20 feet apart.
Mark and Avery are 30 feet apart.
If we locate the position of Lila in the (0, 0)
and we use the relation:
x = r*cos(θ) and y = r*cos(θ)
Then the position of Avery is:
P = (20ft*cos(90°), 20ft*sin(90°)) = (0, 20ft)
and the position of mark will be:
P = (0 + 30ft*cos(200°), 20ft + 30ft*sin(300)) = (-28.2ft, 9.7ft)
And because Lila is at the origin, the distance between Mark and Lila is equal to the module of that vector,
Distance = √((28.2ft)^2 + (9.7ft)^2) = 29.8ft
Please answer this math question im desperate!! thank you!! will give brainliest!!
Answer:
A
Step-by-step explanation:
It IS a function because it passes the vertical line test.
If you drew vertical lines through any part of the graph, it would only touch one point, showing that it is a function.
The spinner at the right is divided into eight equal parts. Find the theoretical probability of landing on the given section(s) of the spinner.
P(not less than 5)
Answer:
P(not less than 5) = 0.5
Step-by-step explanation:
Given
Parts of spinner = 8 equal parts
Required
P(not less than 5)
First, it'll be assumed that the parts of the spinner is numbered 1 - 8.
This gives the following sample space (S)
S = {1,2,3,4,5,6,7,8}
Total = 8
To calculate PP(not less than 5), the number of parts not less than 5 is needed.
Parts not less than 5 = {5,6,7,8}
Number of parts = 4
So, P(not less than 5) = Number of parts not less than 5 divided by total number of parts
Mathematically, P(not less than 5) = 4/8
P(not less than 5) = 4/8
P(not less than 5) = ½
P(not less than 5) = 0.5
Hence, the theoretical probability of PP(not less than 5) is 0.5.
Acar traveled 63 miles on 3 gallons of gas. What proportion can you set up to determine how many miles, m, the car can
Tavel on 7 gallons of gas?
637
m
633
m
63
m
Nnjkkk
Answer:
63 miles x miles
----------- = -------------
3 gallons 7 gallons
Step-by-step explanation:
We will use proportions. the number of miles over the gallons of gas
63 miles x miles
----------- = -------------
3 gallons 7 gallons
Answer: 147 miles
Step-by-step explanation:
On 3 gallons, he travelled 63 miles
On 7 gallons, he travels
7/3 x 63 = 147 miles
Let X and Y be independent normal random variables with distributions X „ Np1, 3q and Y „ Np0, 4q. Let W " 1 2X ´ Y ` 6. (a) Identify the distribution W. (b) Find the probability PpW ą 6q.
Answer:
Step-by-step explanation:
Here we have,
E(X) = 1, var(X) = 3, E(Y) = 0, var(Y) = 4
Since X and Y has normal distribution so W will also have normal distribution with mean
E(W) = E(05X-Y+6)
= 0.5E(X) - E(Y) +6
= 0.5* 1 -0+ 6
= 6.5
and variance
Var(W) = Var(0.5X-Y+6)
= 0.25Var(X)+Var(Y)
= 0.25 * 3 + 4
= 4.75
(b)
The z-score for W = 6 is
[tex]z=\frac{6-6.5}{\sqrt{4.75} } \\\\=-0.23[/tex]
The required probability is:
P(W>6) = P(z > -0.23)
= 0.5910
A typist can type 45 words per minute. How many minutes will it take him the type a 2500 word report?
Answer:
55.56 or 55 5/9
Step-by-step explanation:
To find the time it takes to type a report, you need to divide the number of words in the report by the words the typist can type in a minute.
2500/45 = 55.56
It takes 55.56 minutes or 55 5/9 minutes to type a 2500 word report.
Answer:
55 minutes and 33 seconds.
Step-by-step explanation:
To solve this we can set up a proportion.
1/45=x/2500
Cross multiply.
1*2500=45*x
45x=2500
Divide both sides by 45.
x=55.5*
.5* minutes is about 33 seconds. (0.55555*60)
So, it will take him around 55 minutes and 33 seconds.
What is the median of the following set of data?
(4,1,3,6,1,7)
Answer: 3.5
Step-by-step explanation: First, let's put the data set from least to greatest....
1, 1, (3, 4,) 6, 7
The median is the middle number in the data, since it's an even number we will have to do an extra step...
3 + 4 = 7
7 ÷ 2 = 3.5
The median is 3.5, I hope this helps!
Alex was playing a board-game with a six-sided die. She tossed the die for her turn. What is the probability of 5?
Answer:
0.1667 = 16.67% probability of 5
Step-by-step explanation:
A probability is the number of desired outcomes divided by the number of total outcomes.
In this question:
The die can have 6 possible outcomes(1, 2, 3, 4, 5 and 6).
5 is one of the outcomes. So
p = 1/6 = 0.1667
0.1667 = 16.67% probability of 5
The hypotenuse of a 45°-45°-90° triangle measures 128 cm. A right triangle is shown. The length of the hypotenuse is 128 centimeters and the lengths of the other 2 sides are congruent. What is the length of one leg of the triangle? 64 cm 64 StartRoot 2 EndRoot cm 128 cm 128 StartRoot 2 EndRoot cm
Answer:
64√2 or 64 StartRoot 2 EndRoot
Step-by-step explanation:
A 45-45-90 traingle is a special traingle. Let's say one of the leg of the triangle is x. The other one is also x because of the isosocles triangle theorem. Therefore, using the pytagorean theorem, you find that x^2+x^2=c^2. 2(x)^2=c^2. You then square root both sides and get c= x√2.
Therefore, the two legs are x and the hypotenuse is x√2. x√2=128 because the question says that the hypotenuse is 128. Solve for x by dividing both sides by √2. X=128/√2. You rationalize it by multiplying the numberator and denominator of the fraction by √2. √2*√2= 2.
X=(128√2)/2= 64√2 cm.
Since X is the leg, the answer would be 64√2
Answer:
B.
Step-by-step explanation:
The manufacturer of an airport baggage scanning machine claims it can handle an average of 560 bags per hour. (a-1) At α = .05 in a left-tailed test, would a sample of 16 randomly chosen hours with a mean of 538 and a standard deviation of 50 indicate that the manufacturer’s claim is overstated? Choose the appropriate hypothesis.
Answer:
The calculated value t = 1.76 < 2.131 at 0.05 level of significance
Null hypothesis is accepted
The manufacturer’s claim is greater than 560 bags per hour
Step-by-step explanation:
Explanation:-
Given sample size 'n' =16
Given the manufacturer of an airport baggage scanning machine claims it can handle an average of 560 bags per hour.
mean of the Population 'μ' = 560
Mean of the sample Χ⁻ = 538
sample standard deviation' S' = 50
Null hypothesis:H₀:μ > 560
Alternative Hypothesis:H₁ : :μ < 560 (left tailed test)
Test statistic
[tex]t = \frac{x^{-}-mean }{\frac{S}{\sqrt{n} } }[/tex]
[tex]t = \frac{538-560 }{\frac{50}{\sqrt{16} } } = -1.76[/tex]
|t| = |-1.76| = 1.76
Degrees of freedom
γ = n-1 =16-1 =15
[tex]t_{\frac{\alpha }{2} } = t_{\frac{0.05}{2} } =t_{0.025} =2.131[/tex]
Conclusion:-
The calculated value t = 1.76 < 2.131 at 0.05 level of significance
Null hypothesis is accepted
The manufacturer’s claim is greater than 560 bags per hour
Many smartphones, especially those of the LTE-enabled persuasion, have earned a bad rap for exceptionally bad battery life. Battery life between charges for the Motorola Droid Razr Max averages 20 hours when the primary use is talk time and 7 hours when the Internet applications (The wall Street Journal, March 7, 2012).
Since the mean hours for talk time usage is greater than the mean hours for Internet usage, the question was raised as to whether the variance in hours of usage is also greater when the primary use Sample data showing battery hours of use for the two applications follows:
Primary use talking:
35.8 22.2 4.0 32.6 3.5 42.5
8.0 3.8 30.0 12.8 10.3 35.5
Primary use Internet:
24.0 12.5 36.4 1.9 9.9
5.4 1.0 15.2 4.0 4.7
a. Formulate hypotheses about the two population variances that can be used to determine if the population variance in battery hours of use is greater for the talk time application.
H1:σ21_____
Ha:σ22_____
b. What are the standard deviations of battery hours of use for the two samples? Round your answers to two decimal places.
S1_____
S2_____
c. Conduct the hypothesis test and compute the p-value.
- The value of _____
- P-value is _____
Answer:
Null hypothesis: the variance in hours of usage for talking is not greater than the the variance in hours of usage for internet.
[tex]H_o[/tex]: [tex]\sigma _1 ^2 \leq \sigma _2^2[/tex]
Alternative hypothesis: the variance in hours of usage for talking is greater than the the variance in hours of usage for internet.
[tex]H_a : \sigma_1^2 > \sigma_2^2[/tex]
[tex]\mathbf{s_ 1 =16.11}[/tex]
[tex]\mathbf{s_2 = 7.98}[/tex]
Step-by-step explanation:
Let [tex]x_1[/tex] and [tex]x_2[/tex] be the two variables that represents the battery life in hours for talking usage and battery life in hours for internet usage respectively.
The hypothesis can be formulated as:
Null hypothesis: the variance in hours of usage for talking is not greater than the the variance in hours of usage for internet.
[tex]H_o[/tex]: [tex]\sigma _1 ^2 \leq \sigma _2^2[/tex]
Alternative hypothesis: the variance in hours of usage for talking is greater than the the variance in hours of usage for internet.
[tex]H_a : \sigma_1^2 > \sigma_2^2[/tex]
The standard deviation for the battery usage for talking is :
[tex]\bar x_1 = \dfrac{1}{n_1} \sum x_i \\ \\ \bar x_1 = \dfrac{1}{12}(35.8 +22.4+...+35.5) \\ \\ \bar x_1 = \dfrac{241.2}{12} \\ \\ \bar x_1 =20.1[/tex]
The standard deviation Is:
[tex]s_ 1 = \sqrt{\dfrac{1}{n_1-1}\sum (x{_1i}-\bar x_i)^2}[/tex]
[tex]s_ 1 = \sqrt{\dfrac{1}{12-1}\sum (35.8- 20.1)^2+ (35.5-20.1)^2}[/tex]
[tex]s_ 1 = \sqrt{259.568}[/tex]
[tex]\mathbf{s_ 1 =16.11}[/tex]
The standard deviation for the battery life usage for the internet is :
[tex]\bar x_2 = \dfrac{1}{n_2} \sum x_{2i}[/tex]
[tex]\bar x_2 = \dfrac{1}{10} (24.0+12.5+36.4+...+4.7})[/tex]
[tex]\bar x_2 = \dfrac{115}{10}[/tex]
[tex]\bar x_2 = 11.5[/tex]
Thus; the standard deviation is:
[tex]s_2 = \sqrt{\dfrac{1}{n_2-1}(x_{2i}- \bar x_2)^2}[/tex]
[tex]s_2 = \sqrt{\dfrac{1}{10-1}(24-11.5)^2+(4.7-11.5)^2}[/tex]
[tex]s_2 = \sqrt{63.60}[/tex]
[tex]\mathbf{s_2 = 7.98}[/tex]
H(x)=17+x/6 what is h(-18)=
Answer:
If h(x) = 17 + x/6, then h(-18) will equal to 14.
Step-by-step explanation:
We are given an equation...
h(x) = 17 + x/6
When you see h(x), the x represents the value that will be substituted in the equation. "For example, if you have h(9), then 9 would be your x-value." So, we are given h(-18) which means that -18 will be our x-value for this equation. Now that we know this, let's plug in this number into the equation.
h(x) = 17 + x/6
First, substitute the x-value which is -18.
h(-18) = 17 + (-18/6)
Next, divide -18 by 6.
h(-18) = 17 + (-3)
Since -3 is in front of a plus sign, then the equation would be like subtracting 3 from 17 so we will just replace the plus sign (+) with a minus sign (-).
h(-18) = 17 - 3
Now, subtract 3 from 17.
h(-18) = 14
Finally, you have your answer which is 14.
The value of H(x)=17+x/6 at H(-18) is 14.
What is function?In mathematics, a function is represented as a rule that produces a distinct result for each input x. In mathematics, a function is indicated by a mapping or transformation. Typically, these functions are identified by letters like f, g, and h. The collection of all the values that the function may input while it is defined is known as the domain. The entire set of values that the function's output can produce is referred to as the range.
given:
H(x)=17+x/6
Now, we have to find the value of the function at x= -18
So, H(-180= 17+ (-18)/6
H(-18)= 17 - 3
H(-18)= 14
hence, the value of H(-18) is 14.
Learn more about function here:
https://brainly.com/question/12431044
#SPJ5
Sarah Wiggum would like to make a single investment and have $1.7 million at the time of her retirement in 34 years. She has found a mutual fund that will earn 7 percent annually. How much will Sarah have to invest today
Answer:
Sarah has to invest $502,958.58 today.
Step-by-step explanation:
This is a simple interest problem.
The simple interest formula is given by:
[tex]E = P*I*t[/tex]
In which E is the amount of interest earned, P is the principal(the initial amount of money), I is the interest rate(yearly, as a decimal) and t is the time.
After t years, the total amount of money is:
[tex]T = E + P[/tex]
In this question:
[tex]t = 35, I = 0.07, T = 1700000[/tex]
She has to invest P today.
[tex]T = E + P[/tex]
[tex]1700000 = E + P[/tex]
[tex]E = 1700000 - P[/tex]
So
[tex]E = P*I*t[/tex]
[tex]1700000 - P = P*0.07*34[/tex]
[tex]3.38P = 1700000[/tex]
[tex]P = \frac{1700000}{3.38}[/tex]
[tex]P = 502958.58[/tex]
Sarah has to invest $502,958.58 today.
Write an equation of a circle with Center -5 -7 that through the point 0 0
Answer:
The third one, (x+5)^2 + (y+7)^2 = 74
Step-by-step explanation:
The equation for a circle is in the form (x-x coordinate)^2 + ( y - y coordinate )^2 = r^2
the radius is 5^2 + 7^2 = 25 + 49 = 74
and the center is (-5,-7), so it is + 5 and + 7
Talia tossed a penny many times. She got 20 heads and 55 tails. She said the experimental probability of getting heads was
20
55
. Explain and correct her error by completing the sentence. Enter your answer as a simplified fraction.
Answer:
For this case we know that in many times a penny shoes 20 head and 55 tails so then the total of trials are:
[tex] n = 20 +55=75[/tex]
Then we are interested in the probability of getting heads and if we use the Laplace formula we have:
[tex] p =\frac{Possible}{total}[/tex]
And the correct way would be:
[tex] p =\frac{20}{20+55}=\frac{20}{75}[/tex]
If we simplify we got:
[tex] p =\frac{4}{15}[/tex]
And the error was because she use 55 as the total number of trials and that's not the size of the sample space and for this reason she got [tex]\frac{20}{55}[/tex]
Step-by-step explanation:
For this case we know that in many times a penny shoes 20 head and 55 tails so then the total of trials are:
[tex] n = 20 +55=75[/tex]
Then we are interested in the probability of getting heads and if we use the Laplace formula we have:
[tex] p =\frac{Possible}{total}[/tex]
And the correct way would be:
[tex] p =\frac{20}{20+55}=\frac{20}{75}[/tex]
If we simplify we got:
[tex] p =\frac{4}{15}[/tex]
And the error was because she use 55 as the total number of trials and that's not the size of the sample space and for this reason she got [tex]\frac{20}{55}[/tex]
Which of the following are always true in a logical system? Check all that
apply.
A. Theorems
B.Corollaries
C.Postulates
D. Conditional statements
Answer:
A. Theorems
and
B.Corollaries
Step-by-step explanation:
Answer:
theorems corollaries postulates
Step-by-step explanation:
you need to click all three for a correct answer
Ms catall is using a compass to find her way out of the woods the compass has a radius of 4cm what is the compass’s area
Answer:
50.24
Step-by-step explanation:
→To find a circle's (compass) area, you must use the following formula:
A = π[tex]r^2[/tex]
→All you need to do is plug in 4 for the "r," (radius), and solve:
A = π[tex]4^2[/tex]
A = π[tex](16)[/tex]
→When you multiply 16 by pi, we're going to use 3.14:
A = 3.14(16)
A = 50.24
how do you solve 6 1/4 x 2 7/11 =
Answer:
16 and 21/44 or 725/44
Step-by-step explanation:
convert 6 and 1/4 into an improper fraction; 25/4
convert 2 and 7/11 into an improper fraction; 29/11
multiply them together. [tex]\frac{25}{4}[/tex] × [tex]\frac{29}{11}[/tex]
you can do 25 × 29 to get 725
you can also do 4 × 11 to get 44.
725/44 simplifies to 16 and 21/44.
Dead leaves accumulate on the ground in a forest at a rate of 5 grams per square centimeter per year. At the same time, these leaves decompose at a continuous rate of 65 percent per year.A. Write a differential equation for the total quantity Q of dead leaves (per square centimeter) at time t:dt/dQ= ?B. Sketch a solution to your differential equation showing that the quantity of dead leaves tends toward an equilibrium level. Assume that initially (t=0) there are no leaves on the ground.What is the initial quantity of leaves? Q(0)= ?What is the equilibrium level? Qeq= ?
Answer:
ik this not an answer but i reccomend a science calculaor with these questions
Step-by-step explanation:
Given a triangle ABC such that AB = 4. AC = squareroot (41) and BC = 5.
Find the measures of the interior angles of ABC.
Answer:
A = 51.3°, B = 90°, C = 38.7°
Step-by-step explanation:
The given lengths satisfy the Pythagorean theorem:
(√41)² = 4² +5² ⇒ 41 = 16 +25
so we know the triangle is a right triangle. The right angle is opposite the longest side, so is angle B, opposite side AC.
The remaining angles can be found using trig functions. For example, we know ...
tan(A) = BC/AB = 5/4
A = arctan(5/4) ≈ 51.3°
Then the other acute angle is ...
C = 90° -51.3° = 38.7°
Angles A, B, C are ...
(A, B, C) = (51.3°, 90°, 38.7°)
What’s the correct answer for this?
Answer:
ED = 26
Step-by-step explanation:
Using tangent-secant theorem
(12)²=(8)(x+10)
144=8x+80
144-80=8x
8x = 64
x=8
Now
ED = 8+8+10
ED = 26
Answer:
26
Step-by-step explanation:
Applying the tangent-secant theorem, we get:
12^2 = 8 * (x + 10)
144 = 8x + 80
= 8x = 144 - 80
8x = 64
x = 8
Putting x = 8 in ED, which is x + x + 10, we get:
= 8 + 8 + 10
= 26
Hope this helps!
Whysudushysususuajsbzgstsysyzyxyzyzusushshshshhshshshshshshshshdhdususududu
Answer:
b) -6
Step-by-step explanation:
[tex]2\sqrt{10+n} = 4[/tex]
Divide both sides by 2
[tex]\sqrt{10+n} = 2[/tex]
Square both sides of the equation
[tex]10+n=4[/tex]
Isolate the variable
[tex]n = 4 - 10[/tex]
[tex]4 -10 = - 6[/tex]
[tex]n = - 6[/tex]
Select the correct expression and value.
Ray has 3 boxes of chocolates. Each box has 4 layers of chocolates. Each layer has 4 rows of 4 chocolates each. He distributes all the chocolates equally among 16 friends. Identify the expression and the value that give the number of chocolates that each of Ray’s friends gets.
Answer:
Total chocolates= 48
Each friend get 3 chocolates
Step-by-step explanation:
Ray has 3 boxes of chocolates = 3
Each box has 4 layers of chocolates
= 4
Each layer has 4 rows of 4 chocolates each= 4
Total number of chocolates = 3*4*4
Total number of chocolates
= 48 chocolates
He shares 48 chocolates among 16 friends.
They Will all obtain 48/16= 3 chocolates each
Answer: the correct answer is 12