Two girl scouts, Becky and Pauline, are competing to see who can sell more cookies. Becky had $800 in cookie sales. A) If Pauline sold % of Becky's total sales, how much money did Pauline bring in?

The weight of a radioactive isotope was 96 grams at the start of an experiment. after one hour, the weight of the isotope was half of its initial weight. after two hours, the weight of the isotope was half of its weight the previous hour. if this pattern continues, which of the following graphs represents the weight of the radioactive isotope over time? a. graph w b. graph x c. graph y d. graph z