Ifa ball is thrown into the air with a velocity of 40 ft/s, its height in feet after
t seconds is given by
y= 40t - 162.
(a) Find the average velocity for the time period beginning with t =D 2:
(1).5 second
(2).1 second
(3) .05 second
(4) .01 second
(b) Find the instantaneous velocity when t 3 2.
ft/s
ft/s
ft/s
ft/s
ft/s
