A certain forest covers an area of 4000 km2. Suppose that each year this area decreases by 7%. What will the area be after 5 years?
Mathematics · High School · Mon Jan 18 2021
llm
Answered on
given that:- the area of forest = 4000 km2
Each year this area decreases by 7%= 7/100=0.07
let after 5 years area will be:-
F = area after 5 years.
F = 4000(1-0.07)^5.
There is a minus sign because there is decrement in the initial area.
F = 4000(0.93)^5
=4000*0.695
=2780 km2.