4. Helena finds two pieces of a toy construction set that,
when joined together, make a rectangular prism. She
takes one piece away and is left with the piece shown
in the diagram.
Part A
When joined together, the original two pieces form a
rectangular prism with side lengths represented by the
expressions x + 4, 4x + 1, and 3x + 5. What is the volume
of that prism? Explain.
Part B
Find the volume of the construction piece shown in the diagram. Explain.