Answer
$\langle -3.0642,2.5712 \rangle$
Work Step by Step
Using a calculator,
$\textbf{u}=\langle 4\cos140^{\circ},4\sin140^{\circ} \rangle\approx\langle 4(-0.7660),4(0.6428) \rangle\approx\langle -3.0642,2.5712 \rangle$
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