Can someone please give me the answers

(I’ll be giving brainliest)

How many $20 bills do you need to have to make $280

Mozart lenses inc. recently introduced seelites, a thinner lens for eyelasses. of a sample of 800 eyeglass wearers, 246 said they would purchases their next pair of eyeglasses with the new lenses. lenses inc. estimates that the number of people who purchase eyeglasses in a year is 1,700,000. most eyeglasses wearer buy one new pair of eyeglasses a year. what is the annual sales potential for the new lenses.

The two square pyramids are similar. find the total volume of both pyramids if the ratio of their surface areas is 9/16