A widget seller sold 1,035 widgets in 2007 and 687 in 2015. What was the annual rate of sales of widgets over this period?

A new CEO promises to increase company sales by 9% per year from its current level of $3,458,613 to a target level of $12 million. How long would it take for the new CEO to achieve his goal?

If your investment doubles in 6 3/4 years, what approximate annual rate of return would you have earned? If you could earn an annual rate of 7.50%, approximately how long would it take for your investment to double?