Answer: The volume of the light sphere is 3052in³
Step-by-step explanation; diameter of sphere= 18in
therefore, the radius of the sphere = diameter/2
R = 18/2 = 9in
now, the volume of the light sphere = 4/3 πr³
Therefore volume = 4/3*3.14*9*9*9
=3052.08 in³ ≈ 3052in³