$\"\"$

The edge of the stream is modeled as $\"\"$ .

Where the fences are the $\"\"$ and $\"\"$ axis and $\"\"$ is given in miles.

Evaluate $\"\"$ .

$\"\"$ . \ \

Sum rule of integrals : $\"\"$ .

$\"\"$ .

Constant multiple rule of integrals : $\"\"$ .

$\"\"$ .

Power rule of the integrals : $\"\"$ .

$\"\"$

Apply the limits. \ \

$\"\"$

The area of the land is $\"\"$ .

$\"\"$

The area of the land is $\"\"$ .