i really need help pls help

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Answer 1
What do you need help with

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A sample of 29 boxes of cereal has a sample standard deviation of 0.81 ounces. Construct a 95% confidence interval to estimate the true standard deviation of the filling process for the boxes of cereal.
a. ( 0.427,1.144)
b. (0.515,1.105)
c. (0.726,0.726)

Answers

Answer:

The 95% confidence interval is   [tex]0.6428 < \sigma < 1.0954[/tex]

Step-by-step explanation:

From the question we are told that

   The sample size is  n = 29

    The sample standard deviation is [tex]s = 0.81[/tex]

  Generally the 95% confidence interval to estimate the true standard deviation  is mathematically represented as  

                      [tex]\sqrt{\frac{(n- 1)s^2 }{ X^2_( \frac{\alpha }{2 } , n-1)} } < \sigma < \sqrt{\frac{(n- 1)s^2 }{ X^2_(1- \frac{\alpha }{2 } , n-1)} }[/tex]

Generally from the  chi -distribution table  the critical value of [tex]\frac{\alpha }{2}[/tex] at a degree of freedom of  [tex]df = 29 - 1 = 28[/tex]  is  

            [tex]X^2 _{\frac{\alpha }{2} , 28 } =44.46079184[/tex]

Generally from the  chi -distribution table  the critical value of [tex]1 - \frac{\alpha }{2}[/tex] at a degree of freedom of  [tex]df = 29 - 1 = 28[/tex]  is  

             [tex]X^2 _{(1 - \frac{\alpha }{2}) , 28 } = 15.30786055[/tex]

So

                 [tex]\sqrt{\frac{(29- 1)0.81^2 }{ 44.46079184 } } < \sigma < \sqrt{\frac{(29- 1)0.81^2 }{15.315.307860551 }[/tex]

=>              [tex]0.6428 < \sigma < 1.0954[/tex]

“The difference of -5 and -11.”

Answers

the answer would be 6, just like the person who said rn

Let g (2) = 22 – 5 and h (2) = 22 +1.
Find (g+h) (2)

Answers

Answer:

23 + 17 = 40 :)

ASAP PLZ
Which of the following is a conditional statement?
I will eat anything that is dipped in chocolate.
Chocolate can be white or brown.
I like chocolate.
Chocolate chip cookies are the best kind.

Answers

Answer:

im pretty sure its the first

Step-by-step explanation:

Which statement about these triangles is true?

Answers

Answer:

It's the last one

I hoped that helped

PLEASE HELP! WILL GIVE BRAINLIEST!

Answers

Answer:

Answer is C

Step-by-step explanation:

Using SOH CAH TOA

What is the value of n in this expression?

(9^3)^12=9^n

a) 36
b) 15
c) 9
d) 4

Answers

Answer:

A. 36

Step-by-step explanation:

[tex]9^{3*12} =9^{36}[/tex]

You multiply the the exponent

Describe the cross section of the rectangular prism by naming its shape?

Answers

Answer:

rectangle

Step-by-step explanation:

Kind of a confusing question, but I'm guessing that its asking what the shape of the cross section is. And its a rectangle.

On interval 0 ≤ x < 2π, where are the x-intercepts of y = cos(2x)?

StartFraction pi Over 2 EndFraction and StartFraction 3 pi Over 2 EndFraction
0, π, and 2π
StartFraction pi Over 2 EndFraction, pi and StartFraction 3 pi Over 2 EndFraction

Answers

Answer:

Its B

Step-by-step explanation:

Got it right on the test

Answer:

The answer is B

Step-by-step explanation:

Edge 2021

PLZ HELP if u know the amswer​

Answers

Answer:

The correct answer is the last option (d.)

Step-by-step explanation

The answer is 1over15x(19x-81)

anyone help, please. CFA 8
S-IC.2: Decide if a specified model is consistent with results from a given data-generating process, e.g., using simulation.

A drug manufacturer claims that 13% of the population of South Africa is living with HIV. As a World Health Organization researcher, you collect evidence to test this claim. You use statistical techniques to sample 125 random residents of South Africa and find that 20 of them test positive for HIV.

You plan to simulate one sample of 125 residents by randomly selecting 125 integers between 1 and 100.
From your actual sample of 125 residents, what proportion of the sample has HIV? 125


What do the randomly selected numbers represent? Why did you pick 125 of them? The number of residents


What assigned numbers indicate a simulated resident has HIV?



2. You plan to run 100 simulations, each with a random sample of 125 residents.
What do you think the true mean population proportion from the 100 simulations would be close to? Explain why.


Is this a simulation of an observational study or an experimental study? Explain why.


The margin of error for this study is about 0.06 or 6% around the population proportion. Are you able to support the claim of the drug manufacturer? Explain why or why not.


What could be done to make the margin of error smaller and get a better sample of the population? Why does that make sense?

Answers

Answer:

gooooooooooooooooo

Step-by-step explanation:

goooooooooooooooooop

1) The proportion of the sample that has HIV is 0.16. 2) The randomly selected numbers represent the HIV status of the simulated residents.

1. The proportion of the sample that has HIV is 20 / 125 = 0.16.

2. The randomly selected numbers represent the HIV status of the simulated residents. We picked 125 of them because that is the sample size of the actual study.

We can assign the numbers 1 to 13 to represent the simulated residents who have HIV. This is because 13% of the population is estimated to have HIV.

I think the true mean population proportion from the 100 simulations would be close to 0.13, the HIV prevalence rate that was estimated in the actual study. This is because the simulations are randomly generated, and the probability of a simulated resident having HIV is 13%.

This is a simulation of an observational study. This is because the researchers are not intervening in the lives of the simulated residents. They are simply observing the HIV status of the simulated residents.

The margin of error for this study is 0.06, which is 6%. This means that the true population proportion of people with HIV could be anywhere between 0.07 and 0.19. The drug manufacturer's claim that 13% of the population has HIV is within this range, so we cannot definitively support or refute their claim.

To make the margin of error smaller and get a better sample of the population, we could increase the sample size. This would give us more data points to work with, which would make our estimate of the population proportion more accurate. Additionally, we could stratify the sample by age, gender, or other factors that could affect the prevalence of HIV. This would help us to ensure that our sample is representative of the entire population.

To learn more about proportion here:

https://brainly.com/question/32027272

#SPJ2

To make a snack mix, combine 2 cups of raisins with 4 cups of pretzels and 6 cups of almonds. Create a diagram to represent the quantities of each ingredient in this recipe.

Answers

Where the diagram at shorty ?

please need help answer

Answers

Answer:

yudsghbndnshegdm

Step-by-step explanation:send ur location come thruuuuuuuuuuuuuuuuuuuuuuuuuuu

Need Help this is my test! I will mark you as brainliest if you answer!!!
The relationship between the number of hours traveled and the number of miles traveled on a
family road trip is graphed below.
750
15. What is the ratio of hours to miles?
675
600
525
16. How many miles could the family travel
in a period of 12 hours?
450
MILES
375
300
17. About how many hours will it take the family
to travel 700 miles?
225
150
75
Maneuvering the Middle LLC, 2015
1
2
8 9
3 4 5 6 7
TIME (HOURS)

Answers

Answer:

15) The ratio of hours to miles is 1 hour to 75 miles; 1/75

16) They will have traveled 900 miles.

17) It will take them around 9 hours.

Step-by-step explanation:

15) Finding the unit rate of the trend (which in this case I considered to be line) can be done by finding the slope and simplifying it. There is a constant linear slope in this graph so it was evident that as the x-values increased by 1, the y-values increased by 75. All you had to do was convert the values into ratio form which would be 1/75. The 1 should remain "numerator" and the 75 as denominator because it is the hour-to-mile ratio (the units were listed in thw instructions in the chronological order in which they were to be answered in ratio form; 1 hour to 75 miles).

16) You can set up an equivalent-ratios equation. Because we know that the unit ratio is 1 hour to 75 miles, and we were given the value of 12 hours, we can set up the equation like this: 1/75=12/x. I would then multiply the 75 miles by 12 so that the ratios will be proportionate. This gives me 900 miles. Now I know, based on the ratio 12 hours to 900 miles (12/900), that if the family travels for 12 hours, they will have traveled 900 miles.

17) We can do the same thing as we did in number 16. We just have to switch the value we use in the second ratio. This means that the equivalent-ratios equation will look like 1/75=x/700, because 700 miles is our given value as opposed to a value with a unit of hours, and miles are the denominators in these ratios. Now we have to see how many times 75 goes into 700 to figure out what to multiply the 1 by to get our proportionate ratios. We have to divide 700 by 75 which is roughly 9 (rounded down from 9.3). The ratio now reads: 1/75=9/700. This means that it will take the family around 9 hours to drive 700 miles (9 hours to 700 miles was the ratio).

Which function has vertical asymptotes at x=-1 and x=-2, an x-intercept at(8,0) , and no holes?

Answers

Answer:

y = (x - 8)/((x + 1)(x + 2))

Step-by-step explanation:

vertical asymptotes are given as at x=-1 and x=-2

Now, vertical assymptotes are values of x when the denominator is zero.

Thus, the function of the denominator can be written as;

(x + 1)(x + 2)

We are also told that x-intercept at (8,0).

Which means that y is zero when x is 8.

Thus, numerator is 8 when y is zero.

Thus, numerator can be expressed as (x - 8)

Thus,the function is now;

y = (x - 8)/((x + 1)(x + 2))

(-15x^5-6x^3) / (-3x) =

Answers

Answer:

x2= 0

Step-by-step explanation:

Answer:

[tex]45x^{6} + 18^{4}[/tex]

Step-by-step explanation:

i hope this helps

Help please can you do like (1) _____ then like (2) _____ please that would be helpful

Answers

Answer:

down there

Step-by-step explanation:

1. Adam 57 seconds, Cameron 60 seconds, Cody 60 seconds, Kevin 58 seconds, Joao 59 seconds

2.Just line the bars to the times

geometry :

find the measure of the exterior angle

Answers

Answer:

45

Step-by-step explanation:

i believe its 45 or 55

Answer:

92°

Step-by-step explanation:

(2x - 2)° = x ° + 45°

(2x - 2 - x)° = 45°

(x - 2)° = 45°

x - 2 = 45

x = 45 + 2

x = 47

(2x - 2)° = (2*47 - 2)° = (94 - 2)* = 92°

A student said that since –9 is less than 4, then |–9| is less than |4|. Is the student correct? Explain why or why not.

Answers

Answer:

The student is incorrect because I I or absolute value would make the -9 to positive 9.  

Step-by-step explanation:

-9<4

on a numberline

-9 -8 -7 -6 -5 -4 -3 -2 -1 0 1 2 3 4

but the absolute value of -9 (or) |–9|

is actually positive 9

9>4

on a number line

4 5 6 7 8 9

Factor completely

2x^2+7x+5

Answers

Answer:

(2x+5)(x+1)

Step-by-step explanation:

We look for two numbers which multiply to 10(that is 2×5) and add to 7. Our numbers are 2and 5

2×5=10 and 2+5=7

Therefore we have

(2x²+2x)+(5x+5)

2x(x+1)+5(x+1)

(2x+5)(x+1)

w pewnym trapezie o wysokości 6cm jedna z podstaw ma długość 9cm ,a druga jest od niej o 2cm krótsza . Pole tego trapezu wynosi:​

Answers

Odpowiedź:

48 cm

Wyjaśnienie krok po kroku:

Jeśli się uwzględni:

Wysokość trapezu = 6 cm

Długość podstaw:

Podstawa 1 = a = 9 cm

Podstawa 2 = b = (a - 2) = 9 - 2 = 7 cm

Uaing relacji:

Powierzchnia trapezu = 1/2 (a + b) * h

Powierzchnia trapezu = 0,5 (9 + 7) * 6

Powierzchnia trapezu = 0,5 (16) * 6

Powierzchnia trapezu = 8 * 6

Powierzchnia trapezu = 48 cm

what are all values of x for which the series shown converges? ​

Answers

Answer:

One convergence criteria that is useful here is that, if aₙ is the n-th term of this sequence, then we must have:

Iaₙ₊₁I < IaₙI

This means that the absolute value of the terms must decrease as n increases.

Then we must have:

[tex]\frac{(x -2)^n}{n*3^n} > \frac{(x -2 )^{n+1}}{(n + 1)*3^{n+1}}[/tex]

We can write this as:

[tex]\frac{(x -2)^n}{n*3^n} > \frac{(x -2 )^{n+1}}{(n + 1)*3^{n+1}} = \frac{(x -2)^n}{(n + 1)*3^n} * \frac{(x - 2)}{3}[/tex]

If we assume that n is a really big number, then:

n + 1 ≈ 1

And we can write:

[tex]\frac{(x -2)^n}{n*3^n} > \frac{(x -2)^n}{(n)*3^n} * \frac{(x - 2)}{3}[/tex]

Then we have the inequality

[tex]1 > (x - 2)/3[/tex]

And remember that this must be in absolute value, then we will have that:

-1 < (x - 2)/3 < 1

-3 < x - 2 < 3

-3 + 2 < x < 3 + 2

-1 < x < 5

The first option looks like this, but it uses the symbols ≤≥, so it is not the same as this, then the correct option will be the second.

John runs a computer software store. He counted 122 people who walked by his store in a day, 60 of whom came into the stores. Of the 60, only 23 bought something in
the store. Estimate the probability that a person who walks by the store will enter the store?

Answers

Answer:

unlikely

Step-by-step explanation:

60/122

60 ÷122=0.49

0.49 × 100 =49

49% chance

answer is unlikely

Proportions 6. A certain salsa is made with 6 parts tomato and 2 parts bell pepper. How many cups of tomato should be combined with 1.5 cups bell pepper? Write a proportion, then solve. ​

Answers

Answer:

4.5 cups of tomatoes should be combined with 1.5 cups of bell peppers.

Step-by-step explanation:

Given that the salsa is made with 6 parts tomato and 2 parts bell pepper.

Let t be tomatoes and b be bell peppers

The proportion will be:

t:b

The ratio of tomatoes to bell pepper will be:

6:2

This ratio simplifies to 3:1

This means no matter how much more the tomatoes and peppers are, the simplified ratio will be same.

Now the bell peppers are 1.5 cups then the proportion will be:

[tex]t:b::t:b\\6:2::t:1.5\\\frac{6}{2} = \frac{t}{1.5}\\3 = \frac{t}{1.5}\\t = 1.5 * 3\\t =4.5[/tex]

Hence,

4.5 cups of tomatoes should be combined with 1.5 cups of bell peppers.


Need answerrrrrrrrrrrrr fast

Answers

He rides 3 miles per hour.

My work is attached below. I hope you got a good score on your assignment!! ^w^

question is in the picture pls help me. much appreciated

Answers

Okay for a diagonal length it isn’t to hard. So 2y-3 is half of the 12 diagonal

So 2y-3+ 2y-3 = 12 or 4y-6= 12
Add 6 to both sides 4y=20
Divide 4 from both sides y=5

Hope this helps

What is the constant in this expression? X/5 - 9

Answers

Answer:

-9

Step-by-step explanation:

the constant is a single number

Please help!!! I need help

Answers

Answer:

Step-by-step explanation:

What the hell is that oh no I am not doing that

You stand 20 ft from a bottle rocket on the ground and watch it as it takes off vertically into the air at a rate of 18 ft/sec. Find the rate at which the angle of elevation from the point on the ground at you feet and the rocket changes when the rocket is 40 ft in the air. At the moment the rocket is 40 ft in the air, the angle of elevation is changing at a rate of rad/se.

Answers

Answer:

9/50 rad/sec

Step-by-step explanation:

let the angle be represented as ∅

distance form bottle rocket on the ground = 20 ft

height of rocket = 40 ft

solution

first we differentiate w.r.t.time

= sec²(∅)*(d(∅)/dt))=(1/20)*dh/dt   --------- ( 1 )

=  d(∅)/dt = (1/20)cos²(∅)* (dh/dt)   ------- ( 2 )

note :  1/sec(∅) =cos(∅)

therefore ; dh/dt = 18 ft/sec

applying Pythagoras theorem

Tan ∅ =  40 / 20

 h^2( hypotenuse )  = a^2( height )  + b^2 ( distance from bottle rocket )

                     h = √ 40^2 + 20^2 =  √ 2000

also cos ( ∅ ) = b / h  =  20 / √ 2000

hence cos²∅ = 1/5

Back to equation 2

d(∅)/dt=(1/20)×(1/5)×(18)

= 18/100  = 9/50 ( changing rate of angle of elevation )

   

30 is 2/3 of what number

Answers

Answer:45

Step-by-step explanation:

Key Word:of

30*2/3 = 45

Answer:

Step-by-step explanation:

let the number be x.

then,

2/3 of x = 30

=> 2/3x = 30

=> x = 30 × 3/2

=> x = 45

so, the required number is 45 .

hope it helps...!!!

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N January the company produced 3,470 units using 13,880 pounds of the direct material and 2,896 direct labor-hours. During the month, the company purchased 16,900 pounds of the direct material at a cost of $14,640. The actual direct labor cost was $103,840 and the actual variable overhead cost was $47,220. The company applies variable overhead on the basis of direct labor-hours. The direct materials purchases variance is computed when the materials are purchased. The labor rate variance for January is: What does the British ship Somerset most clearly symbolize in Paul Reveres Ride?a. the dangers of the mens missionb. the power of the American armyc. the adventure of travel by sead. the transition from old ways to newPlease don't just choose a random answer just because you want points. 1/2 divided by 7 1/2 The distance from Polnt A to Point B on a scale drawing Is 6 cm. If the scale is 1cm : 10m. What isthe actual distance from A to B? what is the least common multiple between 9 and 6 Divide 1/4 and 2/3 and express the answer in simplest form Which sentence from the passage supports the idea that the problem of being faced with lots of unhealthy food choices pertains to many people? In 2020, the United States population is 3.31 x 108. What is this number in standard form?33,100,000B331,000,000,000331,000,000D3,310,000anybody know the answer?? english julius caesar critical thinking puzzle the letters on his face are E, R, Y, H, and M:) In what ways humans affect animals population? Evaluate the extent to which the Industrial Revolution influenced global reform efforts from 1877 to 1922.The question above is based on the accompanying documents, Documents 17. I need help ASAP!In Sophocles's Greek tragedy Oedipus the King, Oedipus discovers that he has unknowingly killed his biological father and married his birth mother. The horror of this truth causes Jocasta, Oedipuss wife/mother, to hang herself and Oedipus to stab himself in the eyes. What element of Greek tragedy do these final two acts give expression to?A. catastropheB. hamartia(C was removed for being wrong)D. catharsisE. hubris Samantha's savings account paid 2.5% interest per month. Which of the following shows 2.5% as a fraction? Answer these two get marked brainiest! Find the value of each variable I need 6-10 If Paul works on Saturdays, he earns $8 per hour (h). plus a $15 bonus for working on the weekend. He wrote afunction, f(h) = 8h + 15 to help calculate how much he would earn working different numbers of hours next Saturday.How much will Paul earn for working 6 hours and 8 hours?A)$63, $78$63, $78B)$48, $64$48. $64C)$63, $79$63, $79D) $48, $79$48, $79 How did increasing trade and European contact affect Africans in West Africa? Jara estimated her new shoes would cost $475. They actually costed $300 actually attended. What is the relative error? what should we use in soap making process:-a) potassium hydroxideb) sodium hydroxide (lye)Explain why it should be used Why was the spread of Christianity to non-Jews significant?It helped Christianity emerge as a separate faith.It forced Christianity to evolve to meet followers needs.It stopped the persecution of Christians at the hands of Romans.It changed Christianity, as the religions encompassed different faiths.