The airport closest to Silvergrove is 12 miles away from the city center. On a map with a scale of 7 inches = 6 miles, how far apart are the airport and the city center?

To find the distance between the airport and the city center, we can set up a proportion with the given scale of 7 inches = 6 miles. Let's let x be the distance between the airport and the city center.

Using the proportion, we have:

7 inches / 6 miles = x inches / 12 miles.

Cross-multiplying, we get:

6x inches = 7 inches * 12 miles.

Simplifying, we have:

6x inches = 84 inches.

Dividing both sides by 6, we find:

x = 84 inches / 6 = 14 inches.

Therefore, the airport and the city center are 14 inches apart on the map.