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help 2. On Earth, in the absence of air friction, a rock thrown vertically upward at a velocity of 64 feet per second reaches a

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2. On Earth, in the absence of air friction, a rock thrown vertically upward at a velocity of 64 feet per second reaches a height of s(t) = 64t - 16t2. a. Is the distance of the ball from the ground increasing or decreasing at t = 1? Justify. b. When would the rock be at its highest point

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