Allison kicks a stone off the edge of a tall cliff. The distance d (in...

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Allison kicks a stone off the edge of a tall cliff. The distance d (in feet), between the rock and the ground seconds after being kicked is d(t)= -t^2 +4t+474. a. How many seconds elapse before the rock is at a height of 424 feet above the ground? Round your answer to the nearest tenth of a second.b. What is the maximum height that the rock reaches? Round your answer to the nearest whole foot.

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