15 POINTS!! PLEASE HELP

Answer:
A) 252pi
Step-by-step explanation:
The volume of a sphere is [tex]\frac{4}{3}\pi r^{3}[/tex]
First, let's find the diameter of the large sphere.
If D=12, then R=6
[tex]\frac{4}{3}\pi 6^{3}=288\pi[/tex]
Then, we need to find the volume of the smaller sphere
[tex]\frac{4}{3}\pi 3^{3}=36\pi[/tex]
[tex]288\pi -36\pi =252\pi[/tex]
Hope this helps :)
[tex]-noorati[/tex]