Final answer:
Media Mail is the most cost-effective method for sending bound printed material, film, and sound recordings. Jesse should use the metric unit of measurement like grams or kilograms to weigh the package.
Step-by-step explanation:
To determine the most cost-effective type of mail for sending bound printed material, film, and sound recordings, one must consider the specific services offered by the United States Postal Service (USPS). Compared to First-Class Mail, Priority Mail, and Certified Mail, Media Mail is a cost-effective solution for sending educational materials. Media Mail rates are typically much lower because this service is intended specifically for shipping educational materials. However, this comes with the caveat that Media Mail can take longer to deliver compared to options like Priority Mail.
For Jesse's situation in the mailroom, to weigh a package containing books and documents, he should use the metric unit of measurement for mass, such as grams (g) or kilograms (kg), depending on the total weight of the package. This is because the metric system is the international standard used in business and shipping, and it provides a uniform measurement that is widely understood and accepted.