Question

If an object is dropped from a height of 85 feet, the function h(t)=-16t^2+85 gives the height of the object after t seconds. Approximately, when will the object hit the ground?
A. 85 seconds
B.69 seconds
C.0.33 seconds
D. 2.30 seconds

Answer 1

in h(t)=-16t^2+85
put h=0 and calculate t, +ve t wold be your answer