A regional map shows the distance between the amusement park and the wildlife preserve is 18 inches. If the map uses a scale of 9 inches = 5 miles, how far apart are the amusement park and the wildlife preserve in real life?
If the scale of the map is 9 inches = 5 miles, then we can set up a proportion to find the distance in real life:
9 inches / 5 miles = 18 inches / x miles
Cross multiplying, we get:
(9 inches)(x miles) = (5 miles)(18 inches)
9x = 90
Dividing both sides by 9, we find:
x = 10
Therefore, the amusement park and the wildlife preserve are 10 miles apart in real life.