Question 546529
    The map scale for Figure A is 1½ inches represents 315 miles. If the cities of Briar Patch and Sharpstown measure 2¾ inches apart (as the crow flies) on the map, how far would this be on the earth’s surface? Let m represent the number of miles between the two cities. Round to the nearest tenth of a mile if necessary. 
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From::"The map scale for Figure A is 1½ inches represents 315 miles."
that's 
315 miles per 1.5 inches
or
315/1.5 miles/inch
.
m = 2.75(315/1.5)
m = 2.75(210)
m = 577.5 miles