PLEASE HELP ME, YOU WILL SAVE ME Which would produce a sample that would be representative of a school's seventh-grade population?

a. survey every fifth seventh grader entering the cafeteria who brought their lunch to school

b. survey every fifth seventh grader in the library

c. survey every fifth seventh grader entering the school at the beginning of the school day

d. survey every fifth seventh grader in a pre-algebra class

C

Step-by-step explanation:

Not all seventh graders will bring a lunch too school, be in the library, or be in a pre-algebra class, but its reasonable to assume that most will enter the school at the beginning of the day.

C.surveying every fifth seventh grader entering the school at the beginning of the school day

Step-by-step explanation:

d. bc = 12 and ef = 16

step-by-step explanation:

we are given that δabc : δdef such that .

also, it is given that

so, from the options, we need that .

a.

b.

c.  

d.

as, we can see that only option d gives the same ratio as i.e. .

hence, the possible lengths are bc = 12 and ef = 16.