A whale jumps above the surface of the ocean and then dives back under. Its height above the surface can be sketched on a set of axes where x represents time and y represents distance above or below the surface. The domain for this graph is best represented using a set of:
Integers
Positive Integers
Positive real numbers
Real numbers

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.