Use the position function

to answer Exercises 75–76.

You throw a ball straight up from a rooftop 160 feet high with an initial velocity of 48 feet per second. During which time period will the ball’s height exceed that of the rooftop?model a car’s stopping distance, f(x) or g(x), in feet, traveling at x miles per hour. Function f models stopping distance on dry pavement and function g models stopping distance on wet pavement. The graphs of these functions are shown for

(vo s(t) = -16t + vot + So initial velocity, so = initial position, t = time)