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17 June, 07:52

If an object is dropped from a height of 55 feet, the function d=-16t^2+55 gives the height of the object after t seconds. Graph this function. Approximately how long does it take the object to reach the ground (d=0) ?

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  1. 17 June, 11:32
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    To find the time to reach ground solve - 16t^2 + 55 = 0

    t^2 = 55/16

    t = sqrt55 / 4 = 1.85 seconds
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