It takes kasey 55 minutes to walk to school. when she starts her route. it takes her 14 minutes to get to the corner where the grocery store is. it takes her another 22 minutes to get to the pist office. how much longer does she have to get to school without being late

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