Question

1. An object is blasted upward at an initial velocity of 320 ft/s. The height, h(t), of the object is a function of time, t (in seconds), and is given by the formula h(t) = -16t2 + 320t. How long will it take the object the hit the ground after takeoff?

Answer 1

20 seconds

Explanation:

roots are (0,0) and (20,0) so 20-0 will provide the time from takeoff to landing