You borrow $450 from a friend the first week and pay the friend back $25 each week thereafter. Write the first six terms in the sequence. Explain what the sixth term means in the context of the situation

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