Harriet is helping her brother paint an art project like the one shown below. They plan to paint only the lateral faces. One quart of paint covers 87 square feet. If only full quarts can be purchased, how many quarts of paint will they need to complete the project if they plan on using one coat of paint?

Find the sum of the following series. round to the nearest hundredth if necessary.

2y= 3 2 x−2 y = − 1 3 x + 1 y=− 3 1 x+1

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