Help plz will give brainliest!

Answer:

358 randomly selected air passengers must be surveyed.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of [tex]\pi[/tex], and a confidence level of [tex]1-\alpha[/tex], we have the following confidence interval of proportions.

[tex]\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}[/tex]

In which

z is the zscore that has a pvalue of [tex]1 - \frac{\alpha}{2}[/tex].

The margin of error is given by:

[tex]M = z\sqrt{\frac{\pi(1-\pi)}{n}}[/tex]

98% confidence level

So [tex]\alpha = 0.02[/tex], z is the value of Z that has a pvalue of [tex]1 - \frac{0.02}{2} = 0.99[/tex], so [tex]Z = 2.327[/tex].

Assume that a prior survey suggests that about 22​% of air passengers prefer an aisle seat.

This means that [tex]\pi = 0.22[/tex]

How many randomly selected air passengers must you​ survey?

We need a sample of n, and n is found for which [tex]M = 0.051[/tex]. So

[tex]M = z\sqrt{\frac{\pi(1-\pi)}{n}}[/tex]

[tex]0.051 = 2.327\sqrt{\frac{0.22*0.78}{n}}[/tex]

[tex]0.051\sqrt{n} = 2.327\sqrt{0.22*0.78}[/tex]

[tex]\sqrt{n} = \frac{2.327\sqrt{0.22*0.78}}{0.051}[/tex]

[tex](\sqrt{n})^2 = (\frac{2.327\sqrt{0.22*0.78}}{0.051})^2[/tex]

[tex]n = 357.2[/tex]

Rounding up

358 randomly selected air passengers must be surveyed.

Answer:

C is the answer i think

Step-by-step explanation:

Answer:I n no

Step-by-step explanation:

Answer:

skewed left

Step-by-step explanation:

9514 1404 393

Answer:

  162

Step-by-step explanation:

There are many ways to work this. Perhaps the simplest is to recognize that 45% of the number is the difference between 55% of it and 10% of it.

  0.55n -0.10n = 0.45n

  198 -36 = 0.45n = 162

45% of the number is 162.

_____

If you like, you can find the number as ...

  0.10n = 36

  n = 36/0.10 = 360

Then you can verify (if you like), that 55% of it is 198:

  0.55(360) = 198 . . . . true

Finally, you can figure 45% of it:

  0.45(360) = 162

__

Using proportions, you can determine the number to be ...

  36/0.10 = n/0.45

  n = 0.45(36/0.10) = 4.5(36) = 162

Answer:

x=24

Step-by-step explanation:

First: Multiply -6 to both sides

Next: You get 3x=72

Then: Divide 72 by 3

Last:....

ANSWER: x=24

hi !! the answer is x= -24 :))  

Answer:

The markup amount on the cost 39.99 $ will be: 8.78 $

Step-by-step explanation:

Given

As

22% = 0.22

The markup of 22% on the cost can be calculated by multiplying the cost by 22% or 0.22

so

Markup amount = 0.22 × 39.99

                           = 8.78 $

Therefore, the markup amount on the cost 39.99 $ will be: 8.78 $

Answer:

scalene

Step-by-step explanation:

all sides have differing length

thank, 5 star, and brainliest if helpful!

Answer:

B

Step-by-step explanation:

A scalene triangle means all sides lengths are different and that would be the  case here.

Answer:

Step-by-step explanation:

A) = (35,?)

B) = POSITIVE

C) = 601

Answer:

Step-by-step explanation:

Answer:

y=16

Step-by-step explanation:

x=2

y=-3x+22

y=-3(2)+22 then y=-6+22, y=16

The correct answer is C) 54.34°.

Answer:

120 miles

Step-by-step explanation:

just take 24*5 to get how many miles they can travel which would be 120 miles

Answer:  A= s^2 <- for a square

A= 1/2*b*h <- for a triangle

A= 4^2= 16

A= 1/2*8*6 (The whole height is 8 yd)

A= 1/2*48

A= 24

24+16= 40 yd^2

"B" is the answer.

I hope this helps!

Step-by-step explanation: A= s^2 <- for a square

A= 1/2*b*h <- for a triangle

A= 4^2= 16

A= 1/2*8*6 (The whole height is 8 yd)

A= 1/2*48

A= 24

24+16= 40 yd^2

"B" is the answer.

I hope this helps!

Answer:

40 yd²

Step-by-step explanation:

took test :)

Answer:

1, 2 and 4

Step-by-step explanation:

1.32m2/16m +48m/16m =2m +3

2.4m2/2m +6m/2m =2m+3

4.10m2 /5m +15m/5m= 2m+3

Answer:

first one is the answer to this

Step-by-step explanation:

Answer:

The fuel efficiency of Natalie's car is 25 miles per gallon. Which of the following statements are true? Select two that apply.

a. For every mile Natalie travels, she uses 25 gallons.

b. For every gallon Natalie uses, she travels 0.04 miles.

✓c. For every mile Natalie travels, she uses 0.04 gallons.

✓d. For every gallon Natalie uses, she travels 25 miles.

C. and D. are the right answer.

Based on the information given about the distance, the correct options include:

From the information, the The fuel efficiency of Natalie's car is 25 miles per gallon.

Therefore, it should be noted that for every mile Natalie travels, she uses 0.04 gallons and for every gallon Natalie uses, she travels 25 miles.

Learn more about distance on:

https://brainly.com/question/17273444

Answer:

$51.75

Step-by-step explanation:

46 x 1.125 = 51.75

Answer:

The retail price is $51.75.

Step-by-step explanation:

If the original price is $46, and the markup is 12.5 percent, you need to:

46 dollars x 1.125 = 51.75 dollars.

Hope this helps! Please give me Brainliest if you feel this helped. Have a good day and a good rest of 2021, best of luck with your classes.

Answer:

a)   p = 10.20

Step-by-step explanation:

Step(i):-

Given that   p varies directly as q

               p ∝ q

       ⇒    p = k q

where 'K' is proportionally constant

given p =20.8 and q = 31.2

            p = k q

       ⇒ 20.8 = k (31.2)

           [tex]k = \frac{20.8}{31.2}[/tex]

          k = 0.666

Step(ii):-

   p = k q

Given that  q = 15.3 and k = 0.666

  p = 0.666 ×15.3 = 10.20

Answer:

8

Step-by-step explanation:

3/4 = 6/8

Answer:

8 cause common can be like

Answer:

Uh 7/24?

Step-by-step explanation:

Just doing this in my head fyi lol

Answer:

1 mi 1927 ft

Step-by-step explanation:

Turn everything into feet:

5mi x 5280 ft/1 mi  = 26,400ft + 1,348 ft = 27, 748 ft

3mi x 5280 ft/1 mi = 15,840ft + 4,701 ft = 20,541 ft

Do the subtration that the problem wants you to do:

27, 748 ft - 20,541 ft = 7,207 ft

Turn the answer into mi & ft:

7,207 ft - 5280 ft = 1927 ft

=

1 mi 1927 ft

Answer:

This answer is C, it is on the perpendicular bisector of segment LC.

Draw any line segment P and L, then another point C anywhere, but the length needs to be the same as PL.  You will note that LC (if you connect those points) will become the perpendicular bisector to point P.

I hope that makes sense.....

Step-by-step explanation:

Step-by-step explanation:

1 litre = 1000ml

780ml left

lost amount = 1000 - 780 = 220ml

Answer:

A. 67.8%

Step-by-step explanation:

the total number of occurences are 202

Now the total number of occurencess for 4 and below are 137

So Heres the quickest way to do it: Divide 137 by 202 then multiply it by 100 being 100%

Then you would get 67.8, then well put the percent sign behind it.

Answer:

$200 sorry if im wrong i tried

Step-by-step explanation:

to calculate the 5 percent:  2000/100=20 20x5=100

so 100x2=200

Answer:

sixty percent of the bags have a weight over 32.2 ounces

Step-by-step explanation:

answer is B

Answer:

Part A 225-81=144

Step-by-step explanation:

1. 15×15 =225

2. 3×3×3×3 =81

Answer:

price of pencil is 0.74 and eraser is 0.72$

Step-by-step explanation:

Let, "p" represent pencils

and "e" represents erasers.

hence, according to question

13p+10e=16.75 ________(1)

and 25p+2e=19.85________(2)

Multiplying equation (2) by 5,

hence, 125p+10e=99.25________(3)

Substracting equation (3) and (1)

125p+10e-(13p+10e)=99.25-16.75

hence, 112p=82.5

p=0.74

substituting the value in equation (1),

13(0.74)+10e=16.75

9.57+10e=16.75

on solving,

e=0.72

hence, price of one pencil is 0.75$, and price of one eraser is $0.72