The number of trees in a forest is 100 million in 1997 and increasing at a rate of 0.3 million trees per year. The total mass of wood in the entire forest at the start of 1997 is 6∗10 kilograms. In 1997 the total mass was increasing at a rate of 6 % per year.
(a) What is the average mass of a tree in 1997? _____kilograms
(b) Is this average increasing or decreasing?
A. decreasing
B. increasing
(c) How quickly? ____ kilograms per year