A certain forest covers an area of 4000 km2 . Suppose that each year this area decreases by 7.25% . What will the area be after 5 years?

Answer 1

Initially the forest area is 4000 km²

Each year, for a span of 5 years, the area decreases by 7.25%.

Let F = area after 5 years.

F = 4000(1-0.0725)⁵. There is a minus sign because there is a decline in the initial area.

F = 4000(0.9275)⁵ = 2745.55 km².