The population in the northeast was 53,594,378 people in 2000 and 55,317,240 people in 2010. by about what percent did the population change? did the population grow or shrink?

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