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What effect do interest rates have on the calculation of future and present value, how does the length of time affect future and present value, how do these two factors correlate.
It depends how the interest is calculated. If it's compounded, your initial 500 investment would be worth 638.15 after 5 years.
Simple interest, 500 + (5 x 5 x 4) = 600. Compound 500 x 1.04^5 = 632.66
Future Value = (Present Value)*(1 + i)^n {i is interest rate per compounding period, and n is the number of compounding periods} Memorize this.So if you want to double, then (Future Value)/(Present Value) = 2, and n = 16.2 = (1 + i)^16 --> 2^(1/16) = 1 + i --> i = 2^(1/16) - 1 = 0.044274 = 4.4274 %
Future value= 25000*(1.08)10 =53973.12