Answer:
351.86cm^3
Step-by-step explanation:
Well, the volume of the part we need to take out is approximately 157.08cm^3 (with a radius of 2.5 and a height of 8). Now we have to find the volume of the larger cylinder (with a radius of 4.5 and a height of 8), which is approximately 508.94cm^3. Now subtract the volume of the little cylinder from the volume of the large cylinder (508.94cm^3 - 157.08cm^3). The volume of the metal casting is 351.86cm^3.
(your teacher might want you to round differently)
:)