Algebra
posted by Sasha .
Two cities are 5 1/2 inches apart on a map. The actual distance between the cities is 66 miles. What scale was used to draw the map?

5.5 in represents 66 miles
1 inch represent 66/5.5 miles
1 inch represents 12 miles
on many maps you will find a true ratio without units
to get that you would have to calculate the number of inches in 12 miles. 
A map has a scale of 1 cm : 20 km. Two cities are 2.5 cm apart on the map. To the nearest tenth of a kilometer, what is the actual distance that corresponds to the map distance?

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