Question

A certain forest covers an area of
3600
km2
. Suppose that each year this area decreases by
8.5%
. What will the area be after
6
years?

Answer 1

Let :
P be the Initial Area, = (3500 km²)
r, the rate of decrease = ( - 8.5%)
n, the number of year = 6 years
A the resulting Area: ?

A = P(1+i)ⁿ
A= 3600(1-0.085)⁶
A = 3600( 0.915)⁶ 
A = 2112.66 km²