7t^2 – 2t + 9 = 0
pls solve using any method!

Aball is thrown from a height of 139 feet with an initial downward velocity of 15 ft/s. the ball's height h (in feet) after t seconds is given by the following. h=139-15t-16t^2 how long after the ball is thrown does it hit the ground? round your answer(s) to the nearest hundredth. (if there is more than one answer, use the "or" button.) t =

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Astudent showed the steps below while solving the inequality |x-4|< 1 by graphing.