Answer
Volume of Hoberman Sphere $=449$ $in^{3}$
Work Step by Step
$r=\frac{d}{2}$
$r=\frac{9.5}{2}$
$r=4.75$
$\frac{4}{3}\pi r^{3}$
$\frac{4}{3}\times3.14\times4.75^{3}$
$=448.6929167$
$$449 in^{3}$$
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