08-07-2015
Mathematics

contestada

On a map, 3 inches corresponds to 100 miles. Find the actual distance between two cities that are 7 1/2 inches apart on the map.

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hunaifirst hunaifirst

08-07-2015

Check by using law of ratios and proportions:
3 is to 100 = 7.5 is to x
Rule: The product of the means equals the product of the extremes.
3•x = 7.5•(100)
3x = 750
x= 750 : 3
x = 250

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