Answer Happy

Suppose that a baseball is tossed straight upward and that its height (in feet) as a function of time (in seconds) is given by the formula h(t) = 128t - 16t². At what time is the height of the ball 112 feet? Select the correct response: 2 sec 1 sec 7 sec 4 sec 5 sec 6 sec

A. particle moves according to a law of motion s = t³ - 12t² + 36t, t ³ 0 where t is measured in seconds and s in meters. Find the acceleration after 3 sec. elect the correct response: -6m/sec² 6m/sec² -7m/sec² -9m/sec² 7m/sec² 9 m/sec²