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21 September, 02:48

If an object dropped from the height of 144 ft the function h (t) = - 16t^2+144 gives the height of the object after t seconds. When will the object hit the ground?

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  1. 21 September, 02:53
    0
    3 seconds

    0 = - 16t^2+144

    -144/-16=9

    9=t^2

    Sq rt of 9 is 3
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