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My name is Ann [436]
3 years ago
15

The borrower in a $238,000 loan makes interest payments at the end of each six months for eight years. These are computed using

an annual effective discount rate of 6.5%. Each time he makes an interest payment, the borrower also makes a deposit into a sinking fund earning a nominal interest rate of 4.2% convertible monthly. The amount of each sinking fund deposit is D in the first three years and 2D in the remaining five years, and the sinking fund balance at the end of the eight years is equal to the loan amount. Find D.
Business
1 answer:
yanalaym [24]3 years ago
7 0

Answer:

D = 7980.55

Explanation:

Since the borrower pays in 6 months wich is half a year, we calculate the semi-annual rate = \frac{Annual rate of intrest}{Number of months}

= \frac{0.042}{12}

= 0.0035 = 0.35%

The effective semi-annual rate is, [(0.0035)⁶- 1] = 0.02118461

\frac{D[(1.02118461)^{16}  - 1]}{1.02118461) - 1} + \frac{D[(1.02118461)^{10}  - 1]}{1.02118461) - 1} = 238000

\frac{D(1.398518 - 1)}{0.02118461} + \frac{D(1.233226 - 1)}{0.02118461} = 238000

0.631744D = 238000 * 0.02118461

0.631744D = 5041.937

Therefore D = 7980.55

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