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18 September, 17:23

Your friend competes in a high jump competition at a track meet. the function h=-16t+18t models height h (in feet) of your friend after t seconds. after how many seconds is your friend at a height of 4 feet? after how many seconds does your friend land on the ground?

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  1. 18 September, 17:38
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    The function that models the height is given by:

    h=-16t+18t

    thus the value of t when h=4ft will be:

    4=-16t+18t

    4=2t

    h=4/2

    t=2 seconds

    Answer: 2 seconds
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