This year, a woman has a lucrative one-year position. During

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This year, a woman has a lucrative one-year position. During this year, she will give a fraction f of her salary to her husband, a private investor, to invest and they will live this year on the remainder. Through investments, her husband can turn each dollar she gives him into 1 + r, which will be deposited in a bank account. Their goal is to save & invest enough money so they can live off this money for two years following the end of the wife's position. Toward this end, they want to choose f such that the amount in the account at the end of the year is twice what they lived off this year. In terms of r, what should f be?


A. 1/(r+1)
B. 2/(r+2)
C. 2/(2r+1)
D. 2/(r+3)
E. 2/(2r+3)

The OA is D