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Definition

Inverse of function

If f is a one-to-one function, then the inverse of f is the function formed by interchanging the independent and dependent variables for f. Thus, if (a,b) is a point on the graph of f, then (b,a) is a point on yhe graph of the inverse of f.

interest on an investment

An investor purchases 50 shares of a stock at $47.52 per share. After 200 days, the investor sells the stock for $52.19 per share. Using the commission schedule in Table 1, find the annual rate of interest earned by this investment.(Express the answer as a percentage, correct to three decimal places.)

A person deposits $2,000 each year for 25 years into an IRA. When she retires immediately after making the 25^th deposit, the IRA is worth $220,000.

(a)Find the interest rate earned by the IRA over the 25-year period leading up retirement.

(b)Assume that the IRA continues to earn the interest rate found in part (A).How long can the retiree withdraw $30,000 per year? How long can she with draw $24,000 per year?

A person deposits $2,000 each year for 25 years into an IRA. When she retires immediately after making the 25^th deposit, the IRA is worth $220,000.