If an Object Is Dropped from a High Cliff or a Tall

Essay

If an object is dropped from a high cliff or a tall building, then the distance it has fallen after t seconds is given by the function $f ( t ) = 16 t ^ { 2 }$
Find its average speed (average rate of change) over the following intervals:
(i) Between 2 s and 7 s
(ii) Between $t = c \text { and } t = c + h$