Asked by stefan

Skip is practicing tennis serves against a wall. The distance between Skip and the tennis ball, in feet, at any time T, measured in seconds, is D(T)=-1.5|T-8|+9. which analysis of the formula is true?
A. Skip is 9 feet from the wall and the ball will return to him in 1.5 seconds.
B. Skip is 9 feet from the wall and the ball will return to him in 12 seconds.
C. Skip is 8 feet from the wall and the ball will return to him in 1.5 seconds.
D. Skip is 8 feet from the wall and the ball will return to him in 9 seconds
Answered by bobpursley
well, the distance to the ball is zero when time is 2 and 14 seconds. So if he hits it at t=2, it returns in 12 sec. At time 8, he is at the mazimum distance, D(8)=9
Answered by Steve
finally discovered the difference between () and ||, eh, Stefan?
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