Hi, I have been trying to figure this one math problem for awhile and I am stuck. I believe the answer is between A or B.
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
calculate the distance for different values of t
e.g.
t = 0, D(0) = -1.5(-8) + 9 = 21
t = 1, D(1) = 19.5
...
t = 5 , D)5) = 13.5
..
t = 8 , D(8) = 9
..
t = 12 , D(12) = 3
t = 15 , D(15) = -1.5
This question does not make any sense to me