SOLUTION: A rock falls from a tower that is 480 feet high. As it is falling, its height is given by the formula h(t)=480-16t^2. How many seconds will it take for the rock to hit the ground (

Question 607842: A rock falls from a tower that is 480 feet high. As it is falling, its height is given by the formula h(t)=480-16t^2. How many seconds will it take for the rock to hit the ground (h=0)? Round to the nearest tenth.
Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!

 

Hi

h(t)=480-16t^2

How many seconds will it take for the rock to hit the ground (h=0

 480-16t^2 = 0

    30 = t^2

    5.5sec = t 

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