The height, in feet, of a t-shirt launched from a t-shirt cannon high in the stands at a football stadium is given by h(x)=-16x^2+64x+80, where x is the time in seconds after the t-shirt is launched. what is the maximum height of the t-shirt and how many seconds does it take to reach the maximum height?

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