Compute the permutations and combinations. 10 c 10 choices. 10 1 0

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.

If y varies directly as x2 and y=6 when x=6, find the constant of variation.

If the scale factor between two circles is 2x/5y what is the ratio of their areas?