contestada

the annual rate of inflation is given by the formula I = (p2/p1)^1/n - 1, where p1 is the initial price of an item and p2 is the final price of an item over a period of n years. In 1980, the average price of an ounce of gold was $850. By 2011, the average price was $1,800. In this situation, what is n?