What is the center? what is the radius

Asphere has a diameter of 10 in. what is the volume of the sphere?

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.

Jordan got 27 out of 90 correct on his test . what fraction of the marks did her get correct