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OpenStudy (anonymous):
A ball is kicked upward with an initial velocity of 56 feet per second. The ball's height h (in feet) can be expressed as a function of time t (in seconds) by the equation h = -16t2 + 56t. How much time does the ball take to return to the ground? A) 1.75 seconds B) 2.50 seconds C) 2.75 seconds D) 3.50 seconds
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