This semester, she will spend a total of 27 hours in the chemistry lab, and she will take notes in class 7 hours each week. is this a subtracting sentence or a adding one? btw sorry for wasting your time i just need this done for tommorow so yea.

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.

Is the figure congruent? yes or no?

Ineed the solution to this problem and the steps.