Question

Los angles is about 385 miles from san francisco. how far apart should the city's be on a map with a scale of 1in=1515mil

Answer 1

1 inch=1515 miles
X inches= 385 miles
so 1515 is 3.935 times bigger than 385 miles.
meaning that 1 inch is also 3.935 times bigger than X inches.
to find X we just divide 1 by 3.935
which is: 0.254 inches