You are designing a social hall that will seat no more than 1,600 people. You want at least 500 seats to be priced at 20$ each, and at least 800seats to be priced at 30$ each. Those investing in the social hall would like to bring in at least $2,800 in revenue from the ticket sales.

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