Final answer:
To find the length on the map if the actual distance is 250 miles, set up a proportion using the given scale of 3 inches = 50 miles. Solve for the unknown length on the map by cross-multiplying and dividing. The correct answer is 15 inches.
Step-by-step explanation:
To find the length on the map, we can set up a proportion using the scale. The given scale is 3 inches = 50 miles. We can write this as:
3 inches / 50 miles = x inches / 250 miles
Cross-multiplying, we get:
3 * 250 = 50 * x
750 = 50x
Dividing both sides by 50, we find:
x = 15
Therefore, the length on the map is 15 inches, so the correct answer is A. 15 inches.