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12 March, 15:27

Suppose the equation h = - 16t2 + 35t models the altitude a football will reach t seconds after it is kicked. Is it possible for the football to reach 16 ft in the air? Justify your answer.

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  1. 12 March, 19:13
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    The ball will be able to reach the 16 ft.

    Step-by-step explanation:

    In order to calculate if the ball will be able to reach that height, we must make "h" equal to 16, if there's a real positive solution, then the ball will be able to reach it.

    16 = - 16t² + 35t

    16t² - 35t + 16 = 0

    t = [ - (-35) + - sqrt ((-35) ² - 4*16*16) ] / (2*16)

    t = [35 + - sqrt (1225 - 1024) ]/32

    t = [35 + - sqrt (201) ]/32

    t = (35 + - 14.177) / 32

    t1 = 0.65071875

    t2 = 1.5367

    The ball will reach that height at 0.65 s and 1.53 s.
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