Acme Manufacturing has been restricted to 100 employees in the building at one time. Throughout the day, twenty employees go on break each hour as twenty other employees return from break.

3. Does the number of employees in the building change from hour to hour? Explain your answer.

Yes, the number of employees in the building does change from hour to hour. Each hour, twenty employees go on break and are replaced by twenty other employees returning from break. This means that the composition of employees in the building is constantly changing as some leave for break and others come back.