Population of 10,000 shellfish are approximately normally distributed with mean length of 10 cm and standard deviation 0.2cm. what length corresponds to the top 10% of shellfish lengths?

The hawaiian alphabet has 12 letters. how many permutations are posible for each number of letters?

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 base of a triangle exceeds the height by 9 inches. if the area is 180 square inches, find the length of the base and the height of the triangle.