Answer: The volume of Object A is 8.4 cm^3. The volume of water displaced by Object B is 5.5 mL, so the volume of Object B is 5.5 mL.
Step-by-step explanation:
The equation for volume is length times width times height. To find the volume of Object A, multiply 3.5 times 2.0 times 1.2 to get 8.4 cm^3.
The reason water was displaced by Object B is because Object B has volume and takes up space within the cylinder, pushing water up and out of the way to do so. 5.5 mL of water were moved out of the way for Object B, so we know Object B takes up 5.5 mL of space.