Katherine has a point card for movie theater she receives 20 reward points just for signing up earns 5.5 points for each visit to the theater she needs 75 points for free movie ticket how many visits must Katherine make to earn a free movie ticket

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