The distance between two cities on a map is 3.5 centimeters. the map uses a scale in which 1 centimeter represents 20 kilometers. what is the actual distance between these two cities in kilometers

Aloha!
 To figure out this equation this is what you'd do!
 First. The distance in centimeters is 3.5 
Second, identify how many kilometers your trying to get.
 Third, You are going to multiply 3.5(centimeters) by the 20 kilometers.
Lastly, the answer is 70 kilometers.
 So, to answer you question.. The answer is 70 kilometers is the distance between the two cities.
 I hope this helps!
 Adios! :)