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17 October, 03:37

If an object is dropped from a height of 116 feet, the function h (t) = - 16t^2+116 gives the height after t seconds. When will the object hit the ground?

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  1. 17 October, 06:51
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    Let h (t) = 0 (because when it reaches the ground h=0)

    0=-16t^2+116

    16t^2=116

    divide both sides by 16

    t^2 = 7.25

    square root both sides to find t

    t=2.69sec
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