Keith is planning to drive from los angeles to san francisco. he measured a distance of 5 inches between the two cities on the national map in his road atlas. a scale of 1 inch: 80 miles is displayed on this map.

what does this scale mean?

See Below

Step-by-step explanation:

1 inch:80 miles this is the scale of the map

It means that 1 inches on the map is 80 miles in real life.

So, 5 inches [distance from Los Angeles to San Francisco] would be

5 * 80 = 400 miles in real life

So, it also tells us that the Distance from Los Angeles to San Francisco is 400 miles