Answer:
The scale used on his map is <u>150 miles : 2 inches</u>.
Step-by-step explanation:
Given:
Ted knows the actual distance between two cities is 150 miles. His map shows a distance of 2 inches between these cities.
Now, to find the scale Ted used on his map.
The actual distance Ted know between two cities = 150 miles.
The distance on map between these cities = 2 inches.
So, to get the scale used on his map:
![\frac{The\ actual\ distance\ Ted\ know\ between\ two\ cities}{The\ distance\ on\ map\ between\ these\ cities}](https://tex.z-dn.net/?f=%5Cfrac%7BThe%5C%20actual%5C%20distance%5C%20Ted%5C%20know%5C%20between%5C%20two%5C%20cities%7D%7BThe%5C%20distance%5C%20on%5C%20map%5C%20between%5C%20these%5C%20cities%7D)
![=\frac{150\ miles}{2\ inches}](https://tex.z-dn.net/?f=%3D%5Cfrac%7B150%5C%20miles%7D%7B2%5C%20inches%7D)
![=150\ miles:2\ inches.](https://tex.z-dn.net/?f=%3D150%5C%20miles%3A2%5C%20inches.)
Therefore, the scale used on his map is 150 miles : 2 inches.