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11-11-2022
Mathematics

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A ball is thrown from an initial height of 7 feet with an initial upward velocity of 30 ft/s. The ball's height h (in feet) after / seconds is given by the following.
h=7+301-16r²
Find all values off for which the ball's height is 20 feet.
Round your answer(s) to the nearest hundredth.
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