Question 1010681
If the cube's volume is 64 in^3, then its side is 4 in.  That would also be the diameter of the sphere.
That means its radius is 2 in.  We plug that into the formula to get
{{{V = (4/3)(pi)r^3 = (4/3)(pi)(2^3) = (32/3)(pi) inches^3}}}