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24 August, 04:52

A ball is launched directly in the air at a speed of 60 feet per second from a platform located 20 feet in the air. The motion of the ball can be modeled using the function f (t) = -16t2+60t+20, where t is the time in seconds and f (t) is the height of the ball. After how much time, in seconds, will the ball hit the ground?

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  1. 24 August, 05:03
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    im pretty sure the answer is 1.25
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