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15 February, 17:22

A soccer ball is kicked from ground level. The function y = - 12x (x - 4) shows the height (in feet) of the ball, where x is time (in seconds). After how many seconds will the ball hit the ground?

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  1. 15 February, 17:47
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    4 seconds

    Step-by-step explanation:

    On the ground, height = 0

    -12x (x - 4) = 0

    x = 0, 4

    It was on the ground initially at x = 0, and again at x = 4
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