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31 August, 00:51

An object is dropped from 36 feet below the tip of the pinnacle atop a 360 ft tall building. The height h of the object after t seconds is given by the equation h = - 16t^2 + 324. Find how many seconds pass before the object reaches the ground

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  1. 31 August, 02:42
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    Step-by-step explanation:

    When the object reaches the ground, h = 0.

    0 = - 16t² + 324

    16t² = 324

    t² = 20.25

    t = 4.5

    It takes 4.5 seconds.
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