SOLUTION: The cost of a stamp was 15 cents in 1980 and is 49 cents today, find the rate of change.
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Question 934487: The cost of a stamp was 15 cents in 1980 and is 49 cents today, find the rate of change.
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
Divide the change in price by the # of years.
--> average change/year
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