Question: A ball is projected directly upward from an initial height of 50 ft with an initial velocity of 120 ft per second. Use the formula

A ball is projected directly upward from an initial height of 50 ft with an initial velocity of 120 ft per second. Use the formula s(t)=-16t^2 +120t +50.

a) After how many seconds does the ball reach its maximum height?

b) What is the maximum height?

c) When will the ball be greater than 250 feet above the ground?

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