The graph of f(x)=x2 was transformed to create the graph of g(x)=(x+5)2. Which statement describes this transformation?

A) a horizontal shift to the right 5 units

B) a horizontal shift to the left 5 units

C) a vertical shift up 25 units

D) a vertical shift down 25 units

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