Can someone show me how to do this proof??? Thank You.

I'm being volume of cylinder with 13 in. radius and 30 in height answer choices in pic

Our goal is to collect email addresses from 60% of customers who purchase a product." so that means if i talk to 95 customers, i need to persuade to provide an email address?

Runner ran 1 4/5 miles on monday and 6 3/10 on tuesday. how many times her monday’s distance was her tuesdays distance