- Mr. Chang needs to buy mulch for his garden. He drew a diagram of his
garden. Each square represents 1 square yard. Five pounds of mulch is
enough to cover 50 square yards. Mulch is sold in 2-pound bags. How
many bags of mulch does Mr. Chang need?
8-
6-
4-
2-
2
4
6
8 10
bags.
Mr. Chang needs
(Type a whole number.)

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