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26 June, 00:45

A punter kicks a football upward with an initial speed of 48 feet per second. After how many seconds does the ball hit the ground? Use the formula h = rt - 16t2 where h represents height in feet and r represents the initial speed. Numerical Answers Expected!

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  1. 26 June, 00:59
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    Substituting the given information into the formula gives

    0 = 48t - 16t²

    Factoring, this becomes

    0 = 16t (3-t)

    The ball is at ground level when t=0 or t=3.

    The ball hits the ground after 3 seconds.
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