Amodel rocket is shot straight up in the air. the quadratic function h(t) = −16t^2 + 96t models the height of the rocket above the ground after t seconds. how long does it take for the rocket to return to the ground?

Adecorative window is made up of a rectangle with semicircles at either end. the ratio of ad to ab is 3: 2 and ab is 30 inches. what is the ratio of the area of the rectangle to the combined area of the semicircles? possible answers: a. 2: 3 b. 3: 2 c. 6: π d. 9: π e. 30: π