What is the area of the circle r=5

Can anyone me with 32,33,36,37,and 40.

33% of college students say they use credit cards because of the rewards program. you randomly select 10 college students and ask each to name the reason he or she uses credit cards. find the probability that the number of college students who say they use credit cards because of the rewards program is (a) exactly two, (b) more than two, and (c) between two and five inclusive. if convenient, use technology to find the probabilities.

Anyone? 15m is what percent of 60m; 3m; 30m; 1.5 km?