A culture of bacteria is put in a petri dish and doubles every 4 hours. a) If the initial amount of bacteria is 100, how many bacteria will there be in 15 hours? (Round to the nearest whole number.) b) When will the bacteria count be 350,000?

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.