Final answer:
The tape diagram was divided into 4 boxes to represent the number of bags filled by Noah and his sister. This helps us understand the division of labor between them and allows us to keep track of the items used in each bag.
Step-by-step explanation:
The tape diagram was divided into 4 boxes to represent the number of bags filled by Noah and his sister. Each box signifies a different bag that was filled. This helps us understand the division of labor between them. By dividing the diagram into 4 boxes, it allows us to keep track of the items used in each bag.