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The equation $y = -16t^2 - 60t + 54$ describes the height (in feet) of a ball thrown downward at 60 feet per second from a height of 54 feet from the ground, where $t$ represents time, measured in seconds. In how many seconds will the ball hit the ground? Express your answer as a decimal rounded to the nearest hundredth.

 Jul 14, 2020
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Put y = 0 (this will be when the ball hits the ground) into the equation and then solve for 't'

0 = -16t2 -60t +54     Solve for 't' 

                                   (throw out any negative values found while using Quadratic Fromula or factoring)

 Jul 14, 2020

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