If the total surface area of cone is 704cm^2 and radius of its base is 7cm ,find the volume of cone ? bohothard

What is the answer to this problem 7 * 5/6

With #! i’ve tried to figure it out but i can’t.

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.