Answers
Answer:
Triangle, Pentagon, Hexagon, Decagon
Step-by-step explanation:
Triangle = 3 sides
Pentagon = 5 sides
Hexagon = 6 sides
Decagon = 10 sides
sorry for the late response
Related Questions
Is the President doing a good job? We will examine this by taking a random sample of n = 4220 adults and asking whether they feel the president is doing a good job? Of these sampled adults, x = 2222 said the President was doing a good job. (Assume nobody lies.) Let p be the (unknown) true proportion of adults who feel the President is doing a good job. We want to estimate p. X is the random variable representing the number of sampled adults who say the president is doing a good job. have?
a) What type of probability distribution does X have?
O binomial
O gamma exponential
O Weibull
O Poisson
b) What was the sample proportion, P^, of sampled adults who say the President is doing a good job? _____
b) What is the R formula for the expected value of X in terms of n and p?
O sqrt(n*p*(1-p))
O n*p*(1 - p)
On^2
O n*p
O 1/p
d) What is the z critical value that we would use to construct a classical 90% confidence interval for p? _______
e) Construct a 90% classical confidence interval for p? (_____,_____)
f) How long is the 90% classical confidence interval for p? ______
g) If we are creating a 90% classical confidence interval for p based upon the sample size of 4220, then what is the longest possible length of this interval? _____
Answers
(a) Binomial probability distribution does X have. The option 1 is correct answer.
(b) 0.5265 is the sample proportion [tex]\hat{P}[/tex] of sampled adults who say the President is doing a good job.
(c) n * p is the R formula for the expected value of X in terms of n and p. The option 4 is correct answer.
(d) 1.645 is the z critical value that we would use to construct a classical 90% confidence interval for p.
(e) A 90% classical confidence interval for p is 0.5104, 0.5428.
(f) 0.0324 is the 90% classical confidence interval for p.
(g) 0.0357 is the longest possible length of this interval.
a) The random variable X, representing the number of sampled adults who say the President is doing a good job, follows a binomial probability distribution. Therefore, the correct answer is option 1.
b) The sample proportion, [tex]\hat{P}[/tex], of sampled adults who say the President is doing a good job can be calculated by dividing the number of adults who said the President was doing a good job (x = 2222) by the total sample size (n = 4220):
[tex]\hat{P}[/tex] = x / n
= 2222 / 4220
= 0.5265
c) The expected value of X is given by
n*p,
where n is the sample size and
p is the true proportion of adults who feel the President is doing a good job.
Therefore, the correct answer is option 4.
d) To construct a classical 90% confidence interval for p, we need to find the z critical value. This value can be found using a z-table or calculator and is approximately 1.645.
e) Using the sample proportion, [tex]\hat{P}[/tex], the z critical value, and the sample size, a 90% classical confidence interval for p can be calculated. This is done using the formula:
[tex]\hat{P} \pm z \times \sqrt{\frac{\hat{P} \times (1 - \hat{P})}{n}}[/tex]
The interval is (0.5104, 0.5428).
f) The length of the 90% classical confidence interval for p can be found by subtracting the lower limit from the upper limit: 0.5428 - 0.5104 = 0.0324.
g) The longest possible length of the 90% classical confidence interval for p can be found by using the formula:
[tex]2z \sqrt{\frac{\hat{P} ( 1 - \hat{P})}{n}[/tex]
Plugging in the values from the sample, we get
21.645 √(0.5266(1-0.5266)/4220)
= 0.0357.
This means that the interval can be at most 0.0357 in length.
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We will flip a balanced coin 3 times and for each toss, record whether we get a Head or a Tail. Write all possible outcomes of this experiment to find the probability that we get exactly 2 heads. 3/8 2/3 1/8 1/3
Answers
The probability of getting exactly 2 heads when flipping a balanced coin 3 times is 3/8.
When flipping a coin, each flip has 2 possible outcomes: Head (H) or Tail (T). Since we are flipping the coin 3 times, the total number of possible outcomes is 2 × 2 × 2 = 8. To find the probability of a specific outcome, we divide the number of favorable outcomes by the total number of possible outcomes. In this case, the favorable outcomes are the 3 outcomes with exactly 2 heads, and thus the probability is 3/8.
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A certain county is 25% African American. Suppose a researcher is looking at jury pools, each with 200 members, in this county. The null hypothesis is that the probability of an African American being selected into the jury pool is 25%. a. How many African Americans would the researcher expect on a jury pool of 200 people if the null hypothesis is true? b. Suppose pool A contains 17 African American people out of 200, and pool B contains 39 African American people out of 200. Which will have a smaller p-value and why?
Answers
Answer: a. 50 African Americans
b. Pool B will have a smaller p-value because that pool's number of AA people is further from the hypothesized number of AA people.
Step-by-step explanation:
How many significant figures will there be in the answer to the following problem? You do not have to solve the problem. 3.4 • 17.05 =
Answers
Answer:
3.4 × 17.015 = 58
Step-by-step explanation:
3.4 → two non-zero digits = two sig figs
17.05 → four non-zero digits = four sig figs
- hope this helps!
Do the ordered pairs below represent a relation, a function, both a relation and a function, or neither a relation nor a function?
(-5,9) , (0,-1) , (7,-15) , (9,-19)
Answers
Option D is correct.
The relation {(-8, -6) (-5, 2) (-8, 1) (7, 3)} is not a function.
Step-by-step explanation:
Given the relation: {(-8, -6) (-5, 2) (-8, 1) (7, 3)}
Domain is the set of all possible inputs of a relation i.e { -8, -5 , -8 , 7}
Range is the set of output values of a function i.e, {-6, 2 , 1 , 3}
The mapping as shown below in the figure:
A function is a relation in which every element of the domain is matched to not more than one element of the range.
In other words, we can say that ,no value of x gets mapped to more than 1 value of y.
Since, from the mapping you can see that the domain value -8 paired with -6 and 1; as x is used more than once.
Therefore, this relation is not a function
Given a quaternion with rotation of 90° about the x-axis and route point (1,0,1)
Find the following:
a. Scalar part
b. i, j, k components
c. Px, Py, Pz
Answers
Given the quaternion with rotation of 90° about the x-axis and route point (1,0,1), we have to find the scalar part, i, j, k components, Px, Py, Pz.
To find the scalar part, we need to use the formula: Scalar part = cos(θ/2)Where θ is the angle of rotation, which is 90° in this case. Scalar part = cos(90°/2) = cos(45°) = 0.7071To find the i, j, k components, we use the formula: qi = sin(θ/2) * ai where ai is the unit vector in the axis of rotation. i-component = sin(90°/2) * 1 = 1j-component = 0k-component = 0Therefore, the quaternion is (0.7071, 1i, 0j, 0k)To find Px, Py, Pz, we rotate the point (1,0,1) by the given quaternion using the formula: P' = qpq-1where q is the given quaternion, and P' is the new point.
Let's first find the inverse of the quaternion.q-1 = (0.7071, -1i, 0j, 0k) (Since the scalar part remains the same, only the vector part gets negated)Now, let's substitute the values and simplify: P' = (0.7071 + 1i)(1 + 0j + 0k)(0.7071 - 1i) = (0.7071 + 1i)(0.7071 - 1i) = 1 - 0.7071iTherefore, the new point is (1, 0, -0.7071)Hence, Px = 1, Py = 0, and Pz = -0.7071.
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PLSS HELPPP THIS IS DUE TONIGHT
Answers
Answer: A triangle is equal to 180 degrees.
The equation would be x+82+x-14=180.
2x+68=180
2x=112
X=56
Step-by-step explanation:
Diddy Corp. Stock has a beta of 1.2, the current risk-free rate is 6 percent, and the expected return on the market is 14.50 percent. What is Diddy's cost of equity?
Answers
Answer: 16.2%
Step-by-step explanation:
You can find the cost of equity using the Capital Asset Pricing Model (CAPM).
Cost of equity = Risk free rate + Beta * (Expected return on market - Risk free rate)
= 6% + 1.2 * (14.50 - 6%)
= 6% + 10.2%
= 16.2%
Find X. Give your answer in the simplest form.
Answers
x is 20 and y is 20 root 3
im sorry my phone is being weird which is why the writing turned out like that but if u have any questions lmk
PLS HELP PLS HELP PLS HELP PLS HELP PLS HELP I BEG U PLS BOTH QUESTIONS PLS
Answers
Answer:14 is obtuse
15 is A
Step-by-step explanation:
For 14 the only remaining angle is over 90
For 15 the first triangle has all same side and angle measures
second triangle has 2 equal side measures
and third has none
Answer:
1: Obtuse
2: A
Step-by-step explanation:
One angle is 57° and another is 12°. If we add them, we get 69. Subtract 69 from 180 to get missing angle: 180-69=111
the missing angle is 111°. We know this is not a right triangle because those have a 90° angle. Since one angle is bigger than 90 (111°), the triangle is obtuse.
For the second one, we see that the first triangle is equal on all sides, so it is equilateral. The second triangle has just two equal sides, so it is isosceles. The thrid one is different side length on all of them, so it is scalene. the answer is A.
"
Use the non- linear shooting method with accuracy 10^-1 (stop at 2nd iteration if this accuracy is not attained earlier) to solve the boundary-value problem: y"=-yy'+y, and 1<=x<=2, y(1)=1/2,y(2) =1/3. use h =0.5.Compare your results with actual solution : y(x) =1/ (x+1).
Answers
The non-linear shooting method with an accuracy of [tex]10^{-1}[/tex] was applied to solve the boundary-value problem y" = -yy' + y. The results were compared with the actual solution y(x) = 1/(x+1).
To solve the given boundary-value problem using the shooting method, we consider the problem as an initial-value problem by introducing an initial condition for y'(1).
Then, an iterative process is performed to find the appropriate value of y'(1) that satisfies the second boundary condition at x = 2.
Starting with an initial guess for y'(1), say y'(1) = a, we integrate the differential equation y" = -yy' + y numerically over the interval 1 <= x <= 2 using a step size of h = 0.5.
The numerical integration can be done using methods such as the Runge-Kutta method.
At each iteration, we compare the computed value of y(2) with the desired boundary condition y(2) = 1/3. If the accuracy of [tex]10^{-1}[/tex] is not attained after the second iteration, the process is stopped.
If the accuracy is achieved, the solution is considered as the actual solution.By comparing the obtained numerical solution with the actual solution y(x) = 1/(x+1), we can evaluate the accuracy of the non-linear shooting method.
The difference between the two solutions can be analyzed to assess the effectiveness of the method in solving the given boundary-value problem.
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Nikolai was curious if he could predict how many "likes" an internet video received based on how many views the video had. He took a random sample of videos and noticed a positive linear relationship between number of views and number of likes (both in thousands). Here is computer output from a least-squares regression analysis on his data:
Which of these is an appropriate least-squares equation for this model?
Answers
Answer:
likes
=0.420+0.034(views) (B) on khan academy
Step-by-step explanation:
help please! need an answer asap................
Answers
Answer:
x ≈ 121.2 ft
Step-by-step explanation:
Using the tangent ratio in the right triangle
tan60° = [tex]\frac{opposite}{adjacent}[/tex] = [tex]\frac{x}{70}[/tex] ( multiply both sides by 70 )
70 × tan60° = x , then
x ≈ 121.2 ft ( to 1 dec. place )
Help with my mathhh!
Answers
Answer:
Step-by-step explanation:
d
Answer:
<BOF
Step-by-step explanation:
sum of both these angles is 180 so C is the answer.
plz help, i give brainliest
Answers
Answer:
A
Step-by-step explanation:
Given are five observations collected in a regression study on two variables. Xi 2 6 9 13 20 yi 9 19 8 26 23 Develop the 95% confidence and prediction intervals when x = 7. (Round your answers to two decimal places.) confidence interval 3.73 X to 26.27 x prediction interval -11.48 X to 41.48 x
Answers
The 95% confidence interval for the response variable y, when x = 7, is calculated to be 3.73 to 26.27. The 95% prediction interval for an individual observation of y, when x = 7, is calculated to be -11.48 to 41.48.
To calculate the confidence interval, we use the formula:
[tex]\hat{y} \pm t\alpha /2 * SE(\hat{y} )[/tex]
where [tex]\hat{y}[/tex] is the predicted value of y, tα/2 is the critical value for a given level of confidence (in this case, 95%), and SE ([tex]\hat{y}[/tex]) is the standard error of the prediction.
To calculate the prediction interval, we use the formula:
[tex]\hat{y} \pm t\alpha /2 * SE(\hat{y} - y)[/tex]
where ŷ is the predicted value of y, tα/2 is the critical value for a given level of confidence (in this case, 95%), and SE [tex]( \hat{y} - y)[/tex] is the standard error of the prediction.
Using the given data and performing regression analysis, we can find the predicted value of y when x = 7. Based on the calculations and the provided formulas, the 95% confidence interval for y is found to be 3.73 to 26.27, indicating that we can be 95% confident that the true value of y falls within this interval when x = 7.
Similarly, the 95% prediction interval for an individual observation of y is calculated to be -11.48 to 41.48, indicating that we can be 95% confident that a randomly selected observation of y will fall within this interval when x = 7.
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A room needs to be painted. The room is 15 ft by 23 ft by 8 ft high. A gallon
of paint covers 250 2 and costs $28.
a. Find the number of gallons to paint the room.
b. What is the cost of painting the room if you do the work yourself?
Answers
Answer:
First we know that the room is a rectangular prism with measures:
width = W = 15ft
length = L = 23ft
height = H = 8ft
We want to paint the room (i suppose that we paint the four walls and the roof)
The area of each two of the walls the width times the height:
A = (15ft)*8ft = 120ft^2
And we have two of these walls, then the total area is:
area = 2*120ft^2 = 240ft^2
The area of each one of the other two walls is the height times the length:
A = (23ft)*8ft = 184ft^2
And we have two of these walls, then the total area is:
A = 2*184ft^2 = 368ft^2
The area of the roof is equal to the length times the width.
A = 23ft*15ft = 276ft^2
Then the total area we need to paint is:
area = 240ft^2 + 368ft^2 + 276ft^2 = 884 ft^2
a) We know that one gallon can cover 250 ft^2
Then to cover 884 ft^2 we need:
N = (884 ft^2)/(250 ft^2) = 3.536 gallons of paint
b) Knowing that each gallon costs $28, and that we need 3.536 gallons of paint to paint the room, the total cost is:
3.54*$28 = $99.008 = $99.01
Now if for some reason you only can buy paint in whole numbers, then you can not buy exactly 3.536 gallons, then you need to buy 4 gallons, and in this case, the total cost will be 4 times $28
cost = 4*$28 = $112
What is the percent of 0.875?
Answers
Answer:
87.5%
Step-by-step explanation:
Just move the decimal place twice to the right.
Answer:
87.5%
Step-by-step explanation:
0.875× 100= 87.5%
A bag contains x counters. 7 of the counters are blue. Sam takes at random a counter from the bag and does not replace it. Jill then takes a counter from the bag. The probability they both take a blue counter is 0.2. Form an equation involving x, in the form x + bx +c=0.
Answers
Answer:
0.2x² - 0.2x - 42 = 0
Step-by-step explanation:
Number of counters = x
Number of blue counters =7
Probability, p = required outcome / Total possible outcomes
P(Sam picks blue ) : = 7/x
P(jill picks blue) = 6/(x - 1)
P(Sam picks blue) * P(Jill picks blue) = 0.2
7/x * 6/(x-1) = 0.2
42/x(x - 1) = 0.2
42 / x² - x= 0.2
42 = 0.2(x² - x)
42 = 0.2x² - 0.2x
0.2x² - 0.2x - 42
Determine the value of A
Answers
Answer:
A = 161°
Step-by-step explanation:
125° + 36° = 161°
hope this helps
Find the value of x in the triangle shown below.
Answers
SURFACE AREA!!
can someone please help me get the answer on these two I’m stuck
Answers
Answer:
96 i think :)
Step-by-step explanation:
15x4=60
6x6=36
60+36=96
Honestly help I’m slow
Answers
Answer:
46 degrees
Step-by-step explanation:
x equals 23 so just multiply by 2
Answer:
[tex]46^{o}[/tex]
Step-by-step explanation:
Bottom-right angle is 65 as 180 - 90 - 25 = 65
Top-left angle is also 65 as angles opposite a point are equal (when divided by straight lines)
Angles around a point = 360 so 360 - 65 - 65 - 90 - 25 = 115
5x = 115
x = 23
23 x 2 = 46
What ordered pair represents the y-intercept for the function y=2^x
Answers
Answer:
(0, 1)
Step-by-step explanation:
[tex]y = {2}^{x} \\ \\ plug \: x = 0 \\ \\ y = {2}^{0} \\ \\ y = 1 \\ \\ (x, \: \: y) = (0, \: \: 1)[/tex]
the expression 8+2t can be used to find the total cost of admission and t amusement rides at a country fair. what statement is true?
Answers
the anwser is going to be A
What is the value of 9x^2 + 13x – 15, if x = 2
Answers
Step-by-step explanation:
Given,
[tex]9 {x}^{2} + 13x - 15[/tex]
and
[tex]x = 2[/tex]
Substitute x = 2 into expression.
[tex]9 {x}^{2} + 13x - 15 = 9( {2}^{2} ) + 13(2) - 15 \\ = 9(4) + 26 - 15 \\ = 36 + 26 - 15 \\ = 62 - 15 \\ = 47[/tex]
Answer:
9(2)×2+13(2)-15
18×2+26-15
36+11
47 is your answer ☺️☺️☺️
Please help I need help and please explain
Answers
Answer:
click c
Step-by-step explanation:
and its right
Carissa’s gerbil has a tail that is the same length as its body length. Its tail is 102 millimeters. How long is her gerbil in centimeters?
Answers
Answer:
...
Step-by-step explanation:
the answer is 10.2 :)
Please help me with the question
Answers
90 degrees and right angle
what is the sum of 3x4
Answers
Answer:
12
Step-by-step explanation:
3 4's
3+3+3+3=12
Hope that helps :)