The scale of a map is 1 in. : 15 mi. How many actual miles does each measurement on the map represent? 28. 8.6 in. 29. 10 in. 30. 7 in. 31. 11.2 in
we know that
the scale is
1 in : 15 mi
that means
1 inch in the map represent 15 miles in the actual
so
Applying proportion
Part 28) For 8.6 in in the map
1/15=8.6/x
solve for x
x=8.6*15
x=129 miles
Part 29)
For 10 in
1/15=10/x
x=10*15
x=150 miles
Part 30)
For 7 in
1/15=7/x
x=7*15
x=105 miles
Part 31)
For 11.2 in
1/15=11.2/x
x=15*11.2
x=168 miles