The Pythagorean theorem tells you the distance between the locations is √(52² +75²) ≈ 91.23 mi
The appropriate choice is B. 91 mi
_____ An approximation that can get you within 6% of the correct value is this: add 1/3 of the short side of the right triangle to the long side. Here, that is 75 + 52/3 = 92.3 This is close enough to the correct value to let you choose the correct answer.