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Hoochie [10]
3 years ago
7

A researcher posts a magazine advertisement offering $30 in exchange for participation in a short study. The researcher accepts

the first three people who respond to the advertisement. Which of the following statements is true about the sample?
A. It is not a valid sample because it is not a random sample of the population.
B. It is a valid sample because the first three people were selected to participate. C. It is a valid sample because money was offered to participants.
D. It is not a valid sample because it is only a short study.
Mathematics
2 answers:
Lesechka [4]3 years ago
8 0

Answer:

It is A

Step-by-step explanation:

matrenka [14]3 years ago
7 0
The answer to your question is A
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A rectangular prism has a length of 12 centimeters, a width of 6 centimeters, and a height of 9 centimeters. A cross section is
Klio2033 [76]

Answer:

<h2>The perimeter of the cross section is 30 centimeters.</h2>

Step-by-step explanation:

In this problem we have the intersection of a rectangular prism an a plane.

The dimensions of the rectangular plane are

l=12cm\\w=6cm\\h=9cm

Assuming the plane is cutting the prism horizontally, the cross section would have dimensions

w=6cm\\l=9cm

Because only the height would be cut.

So, the perimeter of the rectangle cross-section is

P_{cross}=2(l+w)=2(6+9)=2(15)=30cm

Therefore, the perimeter of the cross section is 30 centimeters.

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Solve 480 divibed by 8
Thepotemich [5.8K]
480 divided by 8 is 60
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Help me please and thank you.
dezoksy [38]

Answer:

0.67x-2=0.43

Step-by-step explanation:

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3 years ago
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I am Lyosha [343]

Answer:

$30 down  

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Step-by-step explanation:

paying $30 down means the left price to divide into installments is : 130-30 = 100

since he will pay the rest in equal installments, we divide  by the number of installments to get how much each one will be :

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