To find how high school students feel about hot lunches, Adam walks to the nearest high school and gives a survey postcard to every twentieth student that enters the building. He asks the students to mail the postcard in if they choose to participate in the study.

B. It is likely that student opinions in one particular high school do not accurately represent the opinions of all high school students.

and

C. Students that take the time to complete the survey and mail it in probably feel strongly about hot lunches.

Step-by-step explanation:

i got it right

use formula for the circle a=3.14

step-by-step explanation:

the answer is the third / last answer

step-by-step explanation: