Salem and Eugene, Oregon, are 64 miles apart. If the distance on the map is 3 1/4 inches, find the scale on the map

Hm, if 3.25, (written as a decimal of 3 1/4) was 64 miles, let's find a unit rate.

3.25 inches = 64 miles

Divide both sides by 3.25.

1 inch. would be 19.7 miles, estimated to the nearest tenth, 19.69, estimated to the nearest hundredth, and 19.692 when estimated to the nearest thousandth.