PLEASE HELP!! What could be the answer?

Answer:
c. 18[tex]\pi[/tex] cubic inches
Step-by-step explanation:
half sphere's volume:
[tex]V=\frac{2}{3} \pi r^{3}[/tex] r = 6/2 = 3 inches
[tex]V=\frac{2}{3} \pi (3)^{3} =\frac{2}{3}( 27\pi )=\frac{54}{3} \pi =18\pi[/tex]
Hope this helps