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Hekaoru:
Which of the following numbers is rational? A. \(2\sqrt{5}\) B. \(\sqrt{25}\) C. \(2\pi\) D. \(25\pi\)
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Vocaloid:
pi, by definition, is irrational by virtue of it being a non-terminating, non-repeating decimal so that leaves us with 2sqrt(5) and sqrt(25). as a hint, one of these simplifies this to a whole # and the other cannot be simplified further
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