Alg/Trig

If h= -16t^2 + 112t represents the height of a​ rocket, in​ feet, t seconds after it was​ fired, when will the rocket hit the​ ground? (Hint: The rocket is on the ground when h equals=​0).

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  1. 0 = -16 t^2 + 112 t

    factoring ... 0 = -16 t (t - 7)

    0 = -16 t ... t = 0 (launch)

    0 = t - 7 ... t = 7 (return)

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