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Jeff has built a small tower on top of Lynnwood Hall. He stands on top of...

Jeff has built a small tower on top of Lynnwood Hall. He stands on top of the tower and throws a ball into 2 the air. After t seconds the height of ball above the tower in meters is 30t − 5t^2 . The ball lands on the ground after 8 seconds.

(a) How high is the tower above the ground?_____ meters

(b) What was the speed of the ball after 5 seconds? ________ m/s

(c) How high did the ball go above the tower? _________ meters

(d) When was the ball going down at a speed of 5 m/s? At t = ________ seconds

Math   Calculus   
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