SOLUTION: How long will it take to double an investment at 5.4% compounded monthly? Round your answer to the nearest tenth of a year. _____years

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Question 1166445: How long will it take to double an investment at 5.4% compounded monthly? Round your answer to the nearest tenth of a year.
_____years

Found 2 solutions by josgarithmetic, ikleyn:
Answer by josgarithmetic(39617)   (Show Source): You can put this solution on YOUR website!
in which m is in MONTHS.
Solve this for m and then compute for how many years.

Answer by ikleyn(52781)   (Show Source): You can put this solution on YOUR website!
.

In this problem, you have NO right to round the answer to "nearest tenth of a year" - it contradicts to the problem's meaning.

The answer is an integer number of months, since the month is a quantum of time, when the account is compounded monthly.


AGAIN : the instruction CONTRADICTS to the meaning of the problem.



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