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25 October, 23:39

When does it reach maximum height?

H (t) = -16t^2+112t+288

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  1. 25 October, 23:40
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    484 feet maximum

    Step-by-step explanation:

    H (t) = -16t^2+112t+288

    The maximum height occurs at the vertex of this graph.

    Let us find the vertex.

    vertex x-coordinate = - b/2a

    x = - b/2a = - (112) / (2*-16) = 7/2 sec.

    H (7/2) = - 16 * (7/2) ^2 + 112 * (7/2) + 288

    H (7/2) = - 196 + 392 + 288 = 484 feet ...
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