SOLUTION: A rock falls from a tower that is 93.1 m high. As it is falling, its height is given by the formula h=93.1- 4.9t^2, with T in seconds. How many seconds will it take for the rock to

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Question 32404: A rock falls from a tower that is 93.1 m high. As it is falling, its height is given by the formula h=93.1- 4.9t^2, with T in seconds. How many seconds will it take for the rock to hit the fround. (h=0)
Answer by mukhopadhyay(490) About Me  (Show Source):
You can put this solution on YOUR website!
Solving for t in 93.1 - 4.9t^2 = 0 would give us the answer.
93.1 - 4.9t^2 = 0
=> 4.9t^2 - 93.1 = 0
=> t^2 = 93.1/4.9 = 19
=> t = sqrt(19) (because time cannot be negative)
Answer is sqrt(19) (approx 4.36) seconds.