# Math

Ed long promised to pay is son \$400 semiannually for 12 years. Assume Ed can invest his money at 6 % in an ordinary annuity. How much must Ed invest today to pay his son \$400 semiannually for 12 years?

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1. i = .06/2 = .03
n = 24
Present value = 400(1 - 1.03^-24)/.03
= ....

you do the button-pushing

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2. 12 years x2 =24periods

6%/2=3%

24 periods @3%

400 x 16.9355= \$6,774.20

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