Answer
$T=4.44$ seconds
Work Step by Step
$T=2\pi\sqrt{\frac{l}{32}}$
We plug in $l=16$:
$T=2\displaystyle \pi\sqrt{\frac{16}{32}}=2\pi\sqrt{\frac{1}{2}}=\frac{2\pi}{\sqrt{2}}
=\frac{2\pi\sqrt{2}}{2}
=\pi\sqrt{2}=4.44$ seconds
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