*HELP ME PLEASEEE!* This high school stadium contains a track that surrounds a soccer field. The soccer field is 100 yards long and 70 yards wide.
1. What is the area of one of the semicircles at either end of the track?
2. The school decided to cover the semicircles with grass to create a space for stretching and other
activities. How many square yards of grass will the school need to cover the entire circle?
3. What is the distance around one of the semicircles at either end of the soccer field?
4. What is the distance around the inner lane of the track (i. e., the lane closest to the soccer field)?

PLZZZ help me I'll even mark brainliest :)

Apoll is being conducted at a mall nothingto obtain a sample of the population of an entire country. what is the frame for this type of​ sampling? who would be excluded from the survey and how might this affect the results of the​ survey? what is the frame for this type of​ sampling? a. the frame is people who need new clothes. b. the frame is people who shop at the mall. c. the frame is people who like to shop. d. the frame is the entire population of the country. who would be excluded from the survey and how might this affect the results of the​ survey? a. any person that does not need new clothes is excluded. this could result in sampling bias due to undercoverage. b. any person who does not shop at the mall is excluded. this could result in sampling bias due to undercoverage. c. any person who does not shop at the mall is excluded. this could result in nonresponse bias due to people not participating in the poll. d. there is nobody that is being excluded from the survey.