A certain forest covers an area of 4200km^2 suppose that each year this decreases 8.5% what will the area Be after 5 years
Accepted Solution
A:
The correct answer, rounded to the nearest km², is 2694.
Explanation:
This can be represented using an exponential equation of the form
y = a(1+r)ˣ, where y is the total amount, a is the initial population, r is the rate of increase or decrease written as a decimal number, and x is the amount of time.
In our problem, a = 4200, r = -8.5% = -8.5/100 = -0.085, and x is 5:
y = 4200(1+-0.085)⁵ = 4200(0.915)⁵ = 2693.73 ≈ 2694.