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You toss a ball off of a building that is 144 ft above the ground. The position of the ball is given by s(t)

You toss a ball off of a building that is 144 ft above the ground. The position of the ball is given by s(t) = -16t+128t+144, where t is time in seconds. How many seconds will it take for the ball hit the ground? What is the velocity of the ball when it hits the ground? What is the acceleration of the ball when it hits the ground?

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