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2 years ago

15

Suppose 1/4 of people surveyed support changing the school dress code to enforce uniforms. How many people would you have to sel

ect randomly, on average, in order to get 20 people who support the new dress code?

1 answer:

Molodets [167]2 years ago

6 0

Answer:

I'd say around eighty people. Hope that helps.

Step-by-step explanation:

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A man and his three children spent $40 to attend a show. A second family of three children and their two parents spent $53 for t

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$62
Adults are 13 and kids are 9

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2 years ago

Based on data from the Greater New York Blood Program, when blood donors are randomly selected the probability of the having Gro

Gnesinka [82]

Answer:

The probability that at least one of the 5 donors has Group O blood type is 0.9497.

Step-by-step explanation:

We can model this as a binomial random variable, with n=5 (the sample size) and p=0.45.

The probability that exactly k donors have Group O blood type in the sample can be written as:

$P(x=k) = \dbinom{n}{k} p^{k}(1-p)^{n-k}\\\\\\P(x=k) = \dbinom{5}{k} 0.45^{k} 0.55^{5-k}\\\\\\$

We have to calculate the probability P(x≥1). In this case it easy to substract from 1 the probabitity that x is exactly 0:

$P(X\geq1)=1-P(x=0)\\\\\\P(x=0) = \dbinom{5}{0} p^{0}(1-p)^{5}=0.55^5=0.0503\\\\\\P(x\geq1)=1-0.0503=0.9497$

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3 years ago

A zoologist researched the feeding habits of lemurs. She collected data by studying the lemurs in a zoo exhibit for a one-month

timofeeve [1]

I think that it’s observational study because she is observing them. If not experiment.

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2 years ago

2. Brian is filling a conic container with water. He has the container half full. The radius of the container is 5 inches and th

MakcuM [25]

Answer:

current volume of the water = 785.714 in²

Height of new container = 10 inches

Step-by-step explanation:

Radius of the container = 5 inches

Height of the container = 20 inches

Volume of the container = πR²H = (22/7) × 5² × 20 = 1571.428571428 in²

Since the container is half filled with water, volume of the water = 1571.428571428 ÷ 2 = 785.714 in²

b. Volume of cylinder = πR²H = volume of water from first container = 785.714 in²

Hence 785.714 = (22/7) × 5² × H

H = (785.714) ÷ [(22/7) × 25] = 10 inches

Height of new container = 10 inches

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3 years ago

What is the value of cos(tan-1(0))?<br><br> –1<br> 0<br> 1<br> StartFraction pi Over 2 EndFraction

djyliett [7]

Answer:

answer is 1

Step-by-step explanation:

just did test on edge

4 0

3 years ago