Mathematics, 17.12.2020 05:40 gl648809

A ball is thrown downward from the top of a 140-foot building with an initial velocity of 15 feet per second. The height of the ball h after t seconds is given by the equation h=-16t^2 - 15t + 140 How long after the ball is thrown will it strike the ground?
[___} sec
(Round to the nearest tenth as needed.)

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