Mathematics, 17.12.2020 20:30 thedocgalloway

A football is kicked into the air. Its height above the ground changes according to the equation y --16x2 + 80x +3, where x = time in seconds and ) = height in feet. The ball reaches a height of 67 feet twice: once on the way up and once on the way down. How much time does the ball spend at or above a height of 67 feet?

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