EXPLANATION:
Given;
We are told that a forest covers an area of 2300 square kilometers.
Next we are told that this forest area decreases by 7.75% each year.
Required:
We are required to calculate the area remaining after 8 years.
Step-by-step solution:
To solve this math problem, take note that what we have is an exponential decay problem. The initial size decreases (decays) at a constant rate every year.
The formula for an exponential growth/decay is given as shown below;
[tex]f(x)=a(1-r)^x[/tex]Where the variables are as follows;
[tex]\begin{gathered} a=initial\text{ }value \\ r=rate\text{ }of\text{ }decay \\ x=number\text{ }of\text{ }years \end{gathered}[/tex]With the values given, we can substitute and we'll have the following;
[tex]f(8)=2300(1-0.0775)^8[/tex][tex]f(8)=2300(0.9225)^8[/tex][tex]f(8)=2300(0.524482495947)[/tex][tex]f(8)=1206.3097...[/tex]Rounded to the nearest square kilometer, we would now have;
ANSWER:
[tex]Area\text{ }after\text{ }8\text{ }years=1206km^2[/tex]