Answer:
40 miles
Explanation:
In the attached diagram, Point A is the starting point and C is the end point. We want to determine the distance from A to C.
The path driven forms a right triangle in which AC is the hypotenuse.
We therefore use the Pythagorean Theorem to solve for the AC.
Pythagorean Theorem:


The straight line distance from the starting point is 40 miles.