christinatran105 christinatran105

27-09-2018
Mathematics

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In 1988 a postage stamp cost $.27. In 1992 a postage stamp cost $.31. Find the average rate of change in the postage. Answer in units of cents/year.

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medicalmoss medicalmoss

27-09-2018

It changed by $.04 in 4 years.

$.04 / 4 = $.01

The stamp changed by 1 cent/year

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