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Mathematics 15 Online
OpenStudy (2yoututu11):

Which of the following is an irrational number?

OpenStudy (2yoututu11):

\[A. \sqrt{1}\]

OpenStudy (2yoututu11):

\[B. \sqrt{9}\]

OpenStudy (2yoututu11):

\[C.\sqrt{49}\]

OpenStudy (2yoututu11):

\[D.\sqrt{80}\]

OpenStudy (anonymous):

Do you have a calculator?

OpenStudy (2yoututu11):

yes

OpenStudy (anonymous):

So just hit each number and the square root sign, see whether you get a integer or not.

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