The height of a sand dune (in centimeters) is represented by
f(t) = 600 - 7 t^2 cm, where t is measured in years
since 1995 .
Find f(4) and f'(4) , and
determine what each means in terms of the sand dune. Give the values
of f(4)
and f'(4) below, including
units.

You can earn partial credit on this problem.