1. Professor Curie is using the radioactive isotope Francium-223 in her research. This Isotope has a half-life of 22 minutes, which means that every 22 minutes the sample has half the radioactivity it did in the previous interval. If Professor Curle has 15 grams of Francium-223, which explicit formula describes how the isotope decays?
O = 22(0.5) -
O = 15(22)"-1
O=15(0.5)-1
O = 22(0-5)-2

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.

True or false: the graph of y=f(bx) is a horizontal compression of the graph y=f(x) if b< 1

When steve woke up. his temperature was 102 degrees f. two hours later it was 3 degrees lower. what was his temperature then?