## Algebra: A Combined Approach (4th Edition)

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