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 fathers and mothers
D) Marie should make sure she surveys the children as well as the parents

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

Step-by-step explanation:

Instead of asking one parent like the father, she should ask both types of parents. Some parents go the mall by themselves not with their spouse. The parents may even have their own separate car so she needs to ask both of them.

answer: b.

step-by-step explanation:

the y coordinate for point b is 0, and answer b is the only one with that y coordinate.

use formula for the circle a=3.14

step-by-step explanation: