tugboat a and tugboat b are pulling a barge each tugboat is connected to the barge via a cable if the length of the cables are 63 meters and 68 meters and the tugboats are 35 meters apart, find the angle formed between the cables

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