Kizspy | Question: 38
(Choose 1 answer)
(See picture)
A. -45 ft/s
B. 45 ft/s
C. 15 ft/s
D. 75 ft/s
E. -75 ft/s
F. None of the other choices is correct
If a ball is thrown into the air with a velocity of 45 ft/s, its height in feet after t seconds is given by y = 45t-15t². Find the instantaneous velocity when t = 4.
