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The cost of a first-class postage stamp in 1962 was 4 cents. In 1999 it is 33 cents. The cost was (and is) growing exponentially. What was the growth...

The cost of a first-class postage stamp in 1962 was 4 cents. In 1999 it is 33 cents. The cost was (and is) growing exponentially. What was the growth rate?

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