plz plzz help my mom said if i get my math grade and pass 9th grade she will let me get my learners perment during summer so plz help i really wanna get it so we i get 18 i could of o south carlione to go see my bf i havent seen for 5 years and he dont live in geriogia anmore :(

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