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10.10.2019 •
Mathematics
The controller (money manager) for a small company puts some money in a bank account paying 5% per year. he uses some additional money, amounting to 1/3
the amount placed in the bank, to buy bonds paying 66% per year. with the balance of the funds, he buys a 8% certificate of deposit. the first year the investments bring a return of $668. if the total of the investments is $10,000 how much is invested at each rate?
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Ответ:
.04x +.05x/3 + .09(10000 - 4x/3) = 729
4x + 5x/3 + 9(10000 - 4x/3) = 72900
19x/3 = 17100, x = 2700
$2700 @ 4%
$900 @ 5%
$6400 @9%
Ответ:
C = pi•d
C = 3.14(16)
C = 50.24 inches