14. Sophie enjoys running on the indoor track Yesterday Sophie ran a certain number of laps
on the track Today she ran four times as far. She ran 20 laps today. Write and solve an
equation to find how far Sophie ran on the track yesterday

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