In a computer server room, engineers are exposed to potentially harmful electromagnetic fields generated by the servers. The initial exposure level is measured at 200 milligauss (mG). The company decides to implement electromagnetic shielding to reduce exposure. After installation, the exposure level drops to 40 mG. The safety standards mandate a minimum reduction of 70%. Calculate the reduction in exposure using the Exposure Reduction Formula and determine if it meets the safety standards.

6. In a data center, a containment system is used to manage cooling airflow and prevent hot and cold air from mixing. The system effectively contains 80% of the hot air within the designated areas, while 20% of the hot air mixes with the cold airflow. Assess the containment efficiency using the Containment Efficiency Formula to determine if the system is effective.