If a ball is thrown straight up into the air with an initial
velocity of 50 ft/s, its height in feet after t
second is given by y = {50}t - 16t^2 . Find the average
velocity (include units, help (units)) for the time period begining when t = 2 seconds and lasting

(i)

Average velocity:

(ii)

Average velocity:

(iii)

Average velocity:

Finally based on the above results, guess what the instantaneous
velocity of the ball is when

Average velocity:

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