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16 March, 08:47

How long would it take for an egg dropped from a helicopter to fall 256 feet to the ground? d=16t^2

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  1. 16 March, 12:16
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    Well the position function is:

    h (t) = - 16t^2+256

    It will hit the ground when h (t) = 0

    -16t^2+256=0 factor out - 16

    -16 (t^2-16) = 0 factor difference of squares ...

    -16 (t+4) (t-4) = 0, since t>0

    t=4 seconds
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