SOLUTION: I need help with this problem, i dont know how to set it up! thanks! Suppose an object is dropped from a height ho above the ground. Then its height after t seconds is given by h

Question 178252: I need help with this problem, i dont know how to set it up! thanks!
Suppose an object is dropped from a height ho above the ground. Then its height after t seconds is given by h = -9t 2 + ho, where h is measured in feet. Use this information to solve the problem.
A ball is dropped from the top of a building 54 ft tall.
(a) How long will it take to fall half the distance to ground level?
t=____ seconds
(b) How long will it take to fall to ground level?
t=___ seconds
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
(a) If the building is 54 ft tall, then 1/2 the
distance to the ground is ft
The height after seconds is ft
ft

sec
sec
(b)
Falling to ground level,
ft (the height above ground will be )
and, still,ft

sec
sec

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