5-11 5-12 5-13 GROWTH RATES Shalit Corporation's 2008 sales were $12 million. Its 2003 sales were $6 million a. At what rate have sales been growing? b. Suppose someone made this statement: "Sales doubled in 5 years. This represents a growth of 100% in 5 years; so dividing 100% by 5, we find the growth rate to be 20% per year." Is that statement correct? EFFECTIVE RATE OF INTEREST Find the interest rates earned on each of the following: a. You borrow $700 and promise to pay back $749 at the end of 1 year. b. You lend $700 and the borrower promises to pay you $749 at the end of 1 year. c. You borrow $85,000 and promise to pay back $201,229 at the end of 10 years. d. You borrow $9,000 and promise to make payments of $2,684.80 at the end of each year for 5 years. TIME FOR A LUMP SUM TO DOUBLE How long will it take $200 to double if it earns the following rates? Compounding occurs once a year. a. 7% b. 10% c. 18% d. 100% FUTURE VALUE OF AN ANNUITY Find the future values of these ordinary annuities. Compounding occurs once a year. a. $400 per year for 10 years at 10% b. $200 per year for 5 years at 5% c. $400 per year for 5 years at 0% d. Rework Parts a, b, and c assuming they are annuities due. PRESENT VALUE OF AN ANNUITY Find the present values of these ordinary annuities. Discounting occurs once a year. a $400 per year for 10 years at 10% b. $200 per year for 5 years at 5% c. $400 per year for 5 years at 0% d. Rework Parts a, b, and c assuming they are annuities due. 5-14 5-15 1. 10