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A ball is thrown into the air and will have a height in feet after t seconds where h (t) = -5t2 + 40t .

A ball is thrown into the air and will have a height in feet after t seconds where h (t) = -5t2 + 40t . What will the velocity be after 3 seconds? 90 ft/sec O 75 ft/sec 10 ft/sec O 70 ft/sec

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