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January 31, 2015

January 31, 2015

Posted by **Gibbons** on Monday, June 21, 2010 at 8:17am.

- Math? Definitely not "college" -
**Writeacher**, Monday, June 21, 2010 at 8:22amPlease type your

__subject__in the**School Subject**box. Any other words, including obscure abbreviations, are likely to delay responses from a teacher who knows that subject well.

- future values -
**MathMate**, Monday, June 21, 2010 at 3:13pmIf I understand the investment instructions correctly, this is how it works:

The company would invest an amount P which should yield net 8% return each year for 10 years.

The revenue generated is constant each year at $50,000, and includes profit and capital repayment. The capital is repaid from a sinking fund that pays 6% p.a. and should generate the original capital at the end of 10 years. The annual payment into the sinking fund (out of the revenue) is $x.

In short,

P=initial investment

x=annual investment into sinking fund

For the 8% profit over 10 years, we have

P*(0.08*10) = 50000*10 - 10x ...(1)

and that the amount x over 10 years at 6% p.a. should yield exactly P:

P = x*1.06^10/(1.06-1.0) ...(2)

Substituting (2) into (1)

x*1.06^10/(1.06-1.0)*(0.08*10) = 50000*10 - 10x

Solve for x to get $14758.85

and from (2)

P = $440514.32

Substitute the amounts into the scenarios and check.

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