Mathematics, 18.01.2021 03:30, lemoinedegraw

A ball is thrown upward in the air, and its height above the ground after t seconds is H ( t ) = 80t − 16t^2 feet. Find the time t when the ball will be traveling upward at 20 feet per second.

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A ball is thrown upward in the air, and its height above the ground after t seconds is H ( t ) = 80t...

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