f a ball is thrown in the air with a velocity 52 ft/s, its height in feet t seconds later is given by y = 52t − 16t2.
(a) Find the average velocity for the time period beginning when t = 2 and lasting
(i) 0.5 second
(ii) 0.1 second.
(iii) 0.05 second.
(iv) 0.01 second.
(b) Estimate the instantaneous velocity when t = 2.