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March 29, 2015

March 29, 2015

Posted by **Randi** on Saturday, April 30, 2011 at 2:36am.

1) What is the effective interest rate per annum?

2) How much money would she have saved after 5 years?

3) Mary has an an emergency at the end of the second year after she had invested the money.She withdraws $5000 How much money would she receive after 5 years?

- Math -
**drwls**, Saturday, April 30, 2011 at 9:04am1) The balance after one year with compounding is increased by a factor

(1 +(.09/12)^12 = (1.0075)^12 = 1.093807

The effective annual interest rate is therefore 9.3807%

2) 8500*(1.093807)^5 = $ 13,308.29

3) After two years and withdrawing $5000, she is left with

8500*(1.093807)^2 - 5000

= 10,169.52 - 5000 = 5169.52

After three more years, that becomes

5159.52*(1.093807)^3 = $ 6751.98

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