(Choose 1 answer)
(See picture)
A. 60 ft/s
B. 160 ft/s
C. -160 ft/s
D. None of the other choices is correct
E. -60 ft/s
A potato is launched vertically upward with an initial velocity of 100 ft/s from a potato gun at the top of an 85-feet-tall building. The distance in feet that the potato travels from the ground after t seconds is given by
s(t)=-16t2+100t+85.
Find the speed of the potato at 5 seconds.
): 49
