Mathematics, 29.06.2019 00:00 kittylover613
In 1917 the cost of a first-class postage stamp was 3¢. in 1974 the cost for a first-class postage stamp was 10¢. what is the percent of increase in the cost of a first-class postage stamp?
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In 1917 the cost of a first-class postage stamp was 3¢. in 1974 the cost for a first-class postage s...
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