SOLUTION: If a paper plane is thrown from the top of a 147 foot cliff into water, the height of the plane at any given time can be determined by formula h=3t^2 + 147 where h is height of pla

Question 896542: If a paper plane is thrown from the top of a 147 foot cliff into water, the height of the plane at any given time can be determined by formula h=3t^2 + 147 where h is height of plane at t seconds.
After how many seconds will the plane be at height of exactly 20.25 feet?
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
h=3t^2 + 147 = 20.25
Solve for t
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Check your equation, I don't think the height decreases with time.
That could be the first paper airplane on the moon.

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