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OpenStudy (anonymous):
A bank advertises that it pays interest compounded monthly. What is the effective rate of interest?
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OpenStudy (anonymous):
well how much interest do they compound?
OpenStudy (anonymous):
ohh sorry! 3 3/4 %
OpenStudy (anonymous):
What is the amount,(other details about the question)?
OpenStudy (anonymous):
the question does not give the amount
OpenStudy (anonymous):
this is the full question
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OpenStudy (anonymous):
\[A = P(1+r/n)^{nt}\]
OpenStudy (anonymous):
but the problem is that there is no principal cost
OpenStudy (anonymous):
so i'm assuming you want to find the latter factor hence we at least need a time frame and a compounding schedule...
OpenStudy (anonymous):
yes i guess so
jimthompson5910 (jim_thompson5910):
Effective Interest Rate
\[r=(1+\frac{i}{n})^n-1\]
\[r=(1+\frac{0.0375}{12})^{12}-1\]
\[r=(1+0.003125)^{12}-1\]
\[r=(1.003125)^{12}-1\]
\[r=1.03815129-1\]
\[r=0.03815129\]
Effective Interest Rate is 3.8215%
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OpenStudy (anonymous):
jim:are you assuming the questions asking for an annual interest?
jimthompson5910 (jim_thompson5910):
yes I'm assuming that the given rate is an annual rate
OpenStudy (anonymous):
yes that was correct!!!!
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