Question 5 - Quantitative Reasoning Practice Test for the DAT

The arc length of a sector of a circle is \(3\pi\) centimeters. If the measure of the central angle of this sector is \(135^{\circ}\), what is the radius, \(r\), of the circle in centimeters?

\[2\]
\[\sqrt{2}\]
\[\sqrt{8}\]
\[4\]
\[8\]

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