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velikii [3]
2 years ago
5

Marie wants to know the most popular car for parents. She plans to survey the people entering the mall from 10:00 a.m. to 11:00

p.m. What can Marie do to make sure her survey is valid?
A. Marie's sample is valid.
B. Marie should also survey people entering the grocery stores.
C. Marie should make sure she surveys both the fathers and mothers.
D. Marie should make sure she surveys the children as well as the parents.
Mathematics
1 answer:
Andreyy892 years ago
3 0

Answer:

C. Marie should make sure she surveys both the fathers and mothers.

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A sampling of hemlock trees revealed that 7 out of 190 trees are infected with insects. About how many of the 950 hemlock trees
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Answer:

About 35 trees in a state park are infected with insects

Step-by-step explanation:

we know that

7 out of 190 trees are infected with insects

so

using proportion

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\frac{190}{7}=\frac{950}{x} \\\\x=7(950)/190\\\\x= 35

therefore

About 35 trees in a state park are infected with insects

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Step-by-step explanation:

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3 years ago
Sam earned $380 working for 8 hours.<br> How much does Sam earn per hour? $<br> per hour
Crank

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$47.50

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You just take $380 and divide it by 8 hours to get the amount of money per hour, which is $47.50 .

7 0
2 years ago
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Hello could you help me please?
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Answer:

C. 6

Step-by-step explanation:

So it says read less thann 25 books --> that means the numbers are 13,14,14,16,19,21,21,22,23, and 24 --> a total of 10 numbers

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Now, it says how many more --> that means you subtract 4 by 10 = 10 - 4 = 6

Therefore the answer is 6 more students read less than 25 books than read more than 35 books.

3 0
2 years ago
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