If an object is dropped from a height of 98 ft, the function h(t) = -14t^2+98 gives the height of the object after t seconds. When will the object hit the ground?(1 point)
Responses
14 seconds
7 seconds
84 seconds
5 seconds
The object will hit the ground when h(t) = 0.
-14t^2 + 98 = 0
-14t^2 = -98
t^2 = 98/14
t^2 = 7
t = sqrt(7) or t = -sqrt(7)
Since time cannot be negative, the object will hit the ground after 7 seconds.
Therefore, the correct answer is:
7 seconds