SOLUTION: If a Math book currently costs $45 but there has been 4% inflation per year for the prior 5 years, what was the cost of the Math book 5 years ago?

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Question 1181970: If a Math book currently costs $45 but there has been 4% inflation per year for the prior 5 years, what was the cost of the Math book 5 years ago?
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
p, the price 5 years ago

p%2A%281.04%29%5E5=45, the price today;
Can you continue from this?