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February 28, 2015

February 28, 2015

Posted by **Sat** on Sunday, August 2, 2009 at 3:01am.

- Compound Interest -
**drwls**, Sunday, August 2, 2009 at 6:05amThis problem has to be solved in steps.

After 18 months (but before the first payment) the amount owed was

10,000*(1 + 0.115/2)^3 = 11,826.09

After making the first $1800 payment, the principal owed is 10,026.09. That increases by a factor 1 + 0.115/2 at 24 months, making the principal 10,602.59.

Then the interest rate goes down. After 30 months, the amount owed is

10,602.59. x (1 + 0.1074/2)

= 11,171.95

Finally, subtract the second payment from the principal and compute the increase during the last six months of the three year period.

- Compound Interest -
**Alexander**, Tuesday, July 9, 2013 at 1:08pmA sum of £12,000 is invested for 5 years at an interest rate of 3.5% compounded annually. Calculate the value of the investment after 5 years.

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