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azamat
3 years ago
11

A middle school principal wants to change the lunch menu at the school. The principal surveys the students to determine how the

students would feel about the changes. Which survey method will produce the best representative sample? A: survey every fifth student who rides in a car to schoolB: survey 3 randomly selected students from every homeroomC: survey every tenth seventh grade student during lunchD: survey 5 randomly selected students from every art, drama, and music class
Mathematics
2 answers:
Crazy boy [7]3 years ago
8 0

Answer:

Step-by-step explanation:

its 7/8

natita [175]3 years ago
4 0

Answer:

B: Survey 3 randomly selected students from every homeroom.

Step-by-step explanation:

This would be the best way to survey, because all the others have some sort of variable. The principle doesn't know who buys lunch and who doesn't, so why would he just ask kids who ride in a car as there are kids who ride buses, or only 7th grade students, so the best answer would be something that everyone has, like homeroom.

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Svetllana [295]

Answer:

4Hz

Step-by-step explanation:

Standard form of a sine or cosine function,

y = acos(b(x+c))

where a is the amplitude, b is the value to find the period. and c is the phase shift.

Period = \frac{2\pi}{b}

From the equation given in the question,

y = 3cos(8\pi \: t +  \frac{\pi}{2} ) \\ y = 3cos(8\pi(t +  \frac{1}{16} )) \:  \: (factorising \: 8\pi \: out)

We can see:

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4 0
2 years ago
Read 2 more answers
3. A computer is worth $4000 when it is new. After each year it is worth half what it was the previous year
MrMuchimi

Answer:

Answer is 500

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Step-by-step explanation:

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Second year

2,000 divided by 2=1,000

Third year

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7 0
3 years ago
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2 years ago
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Step-by-step explanation:

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First your going to distribute the 3
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3 0
3 years ago
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