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# Solve the problem. A person standing close to the edge on top of a 128-foot building throws a baseball vertically upward.

Solve the problem.

A person standing close to the edge on top of a 128-foot building throws a baseball vertically upward. The quadratic function models the ball's height above the ground, s(t), in feet, t seconds after it was thrown. After how many seconds does the ball reach its maximum height? Round to the nearest tenth of a second if necessary.

s(t)=-16t 2 +64t+21 In this case, the ball will reach maximum height when velocity is zero... View the full answer

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