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OpenStudy (anonymous):
A stone is thrown straight down from the edge of a roof, 725 ft above the ground, at a speed of 7 ft/sec. A. Given that the acceleration due to gravity is -32 ft/sec2, how high is the stone 4 seconds later? ft. B. At what time does the stone hit the ground? sec. C. What is the velocity of the stone when it hits the ground?
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