The area of a square is given by x2, where x is the length of one side. mary's original garden was in the shape of a square. she has decided to double the area of her garden. enter an expression that represents the area of mary's new garden. an expression that represents the area is

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