A rectangle has width w, and its length is 2 units longer than the width, or w + 2. Which polynomial represents the perimeter of the rectangle? Draw it out and label if necessary.

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