Roxie invested $2000 in an account that yielded a fixed rate of annual return compounded annually throughout the duratio

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Roxie invested $2000 in an account that yielded a fixed rate of annual return compounded annually throughout the duration of the investment. If she earned a total interest of $4000 in 6 years, after how many years of investment did she earn a total interest of $52000?

A.18

B.28

C.30

D.56

E. Cannot be determined

Answer: A

Source: e-GMAT
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