11) suppose n is a large odd number. you calculate 2^ (n-1)/2==k (mod n), where k is some integer k ±1 (mod n) a) suppose k 1 (mod n). explain why this implies that n is not prime. b) suppose k 1 (mod n). explain how you can use this information to factor n.

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.

How do you find the circumfrance of a circle?

Plz hurry evaluate the expression a+b where a=8 and b=19