What is the value of the expression below

How does reflecting or rotating a figure change the interior angles of the figure?

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

Ineed to know the ordered pairs for this equation i need the answer quick because it’s a timed test