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OpenStudy (anonymous):
A boy standing on a 64-foot cliff drops a coin off the cliff. If the equation of the height, h, of the coin, t, seconds after it drops is h = -16t2 + 64, about how many seconds will the coin take to reach the bottom of the cliff? A. 1 second B. 1.5 seconds C. 2 seconds D. 2.5 seconds
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