If the rate of inflation averages r per annum over n years, the amount A that $P will purchase after n years is A = P(1 - r)^n, where r is expressed as a decimal.
If the amount that $1500 will purchase is only $1350 after 4 years, what was the average inflation rate?
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Part 1
The average inflation rate was
enter your response here%.
(Round to two decimal places as needed.)