SOLUTION: A certain forest covers an area of 4400 km2. Suppose that each year this area decreases by 8.5%. What will the area be after 15 years?

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Question 1095634: A certain forest covers an area of 4400 km2. Suppose that each year this area decreases by 8.5%. What will the area be after 15 years?
Found 2 solutions by Boreal, ikleyn:
Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
This is of the form A=Ao(1-rate)^n, where n is years
A=4400(0.85)^15
=4400*0.0874, round at the end
=384.4 km^2

Answer by ikleyn(52787) About Me  (Show Source):
You can put this solution on YOUR website!
.
                The correct solution is  THIS:


    Area  =  4400%2A%281-0.085%29%5E15  =  4400%2A0.915%5E15  =  1160.8 km^2.