a tennis ball is launched upward so that at time t its height above the ground is given by h(t)=-3t^2+30t 1. find the velocity of the ball as a function of time  2.. what is the velocity when t=3  3. what time does the tennis ball hit the ground

Trigonometry (MindTap Course List)
10th Edition
ISBN:9781337278461
Author:Ron Larson
Publisher:Ron Larson
ChapterP: Prerequisites
SectionP.7: A Library Of Parent Functions
Problem 47E
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a tennis ball is launched upward so that at time t its height above the ground is given by h(t)=-3t^2+30t

1. find the velocity of the ball as a function of time 

2.. what is the velocity when t=3 

3. what time does the tennis ball hit the ground

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