To find the actual distance between Columbia and Greenville, you can use the scale given on the map. The scale indicates that 1 inch on the map represents 20 miles in reality.
Since the distance on the map is 4.6 inches, you can calculate the actual distance by multiplying the map distance by the scale factor:
\[ \text{Actual Distance} = \text{Map Distance} \times \text{Scale} \] \[ \text{Actual Distance} = 4.6 , \text{inches} \times 20 , \text{miles/inch} \] \[ \text{Actual Distance} = 92 , \text{miles} \]
So, the actual distance between the towns is 92 miles.