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Mathematics 16 Online
OpenStudy (anonymous):

Which is a measure of the efficiency of an investment? A: return rate B: return on investment C: efficiency coefficient

OpenStudy (haichi):

A

OpenStudy (haichi):

(X_X)

OpenStudy (haichi):

.....

OpenStudy (haichi):

I get no medal or fan? I see how it is >.>

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