Math Problem Statement
This is a common issue that people face when they retire. A good friend of your family is about to become another year older, and she has decided that she wants to start putting money away for her eventual retirement. She has the following number of years till retirement and she has the following expenditure objectives for retirement: Years until retirement 20 Amount to withdraw each year $50,000 Years to withdraw in retirement 15 Interest rate 7.5% Because your friend is planning ahead, the first withdrawal will not take place until one year after she retires. She wants to make equal annual deposits into her account for her retirement fund. If she starts making these deposits in one year and makes her last deposit in the day she retires, what amount must she deposit annually to be able to make the desired withdrawals at retirement?
Solution
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Math Problem Analysis
Mathematical Concepts
Future Value
Present Value
Annuity
Formulas
Present Value of an Annuity: PV = PMT × [1 - (1 + r)^(-n)] / r
Future Value of an Annuity: FV = PMT × [(1 + r)^n - 1] / r
Annual Deposit: PMT_deposit = FV / [(1 + r)^n - 1] / r
Theorems
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Suitable Grade Level
Grades 11-12 or College Level
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