Posted by Ajay on Tuesday, June 26, 2012 at 7:17am.
Kate is thinking about investing $60 000 for 4 years. She deposits her money into an account which earns interest paid semiannually at a rate of 7% p.a. After 2½ years, the interest rate drops to 5.6% p.a. and stays constant for the remainder of the investment period.
Use Excel or another suitable method to solve the problems below.
(a) How much interest was accrued in the second year of the investment?
(b) What will be the balance of Kate’s account at the end of the fourth year?

Maths Investments  Reiny, Tuesday, June 26, 2012 at 8:13am
amount after the first 2½ years
= 60000(1.035)^7
= 76336.756
I will assume that the rate for the remaining 1½ of 5.6% is also compounded semiannually
amount at end of 4 years
= 76336.756(1.028)^3
= 82930.26

correction  Maths Investments  Reiny, Tuesday, June 26, 2012 at 9:13am
Don't know how I got 7 as the exponent in the first part
of course it should have been 5 ( for 5 half years in 2 1/2 years)
Please make the necessary corrections.

Maths Investments  Juan, Saturday, November 10, 2012 at 3:06pm
A woman has a total of $9,000 to invest. She invests part of the money in an account that pays 8% per year and the rest in an account that pays 11% per year. If the interest earned in the first year is $840, how much did she invest in each account?
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