You didn't tell us what the "actual distances" are, so we can't actually compute them for you. But we can tell you how to compute the answers for yourself. You want to convert inches to miles so you need to invert the scale factor to get the miles on top; that is 50 miles/inch. Now all you have to do is multiply the distance in inches by 50 to get the actual distance in miles. For example, a distance of 2 inches is:
(2 inches) x (50 miles/inch) = 100 miles
3.5 inches is:
(3.5 inches) x (50 miles/inch) = 175 miles
Now you should be able to do the problem on your own.
