## College Algebra (6th Edition)

$6.7$ miles long
The Pythagorean theorem is $a^2+b^2=c^2$ to solve for the hypotenuse. We are given that the rectangular park is 6 miles long and 3 miles wide, so we plug in those values to the formula. $6^2+3^2=c^2$ $36+9=c^2$ $45=c^2$ $c=\sqrt {45}$ $c=3\sqrt 5$ $c\approx6.7$