When modeling the flow of income and expenditures in an economy the two principal participants are households (consumers) and firms (producers). The normal flow of resources would be that a firm would produce goods and services and the households would consume that good or service. Where else can the income of a household flow

Based on the supply and demand theory, why do medical doctors earn higher wages than child-care workers?

Employees at a library check out books to patrons. books have an isbn and a name. the library sometimes has multiple copies of the same book. books have one or more authors. a patron is an individual who has an active (non-expired) library card. for each library card, we store the person's first and last names and their address. for each employee, we store their employee id, current salary, first and last name and their address. we also store the employee id of their current manager. each time we check out a book to a patron we need to store the date of the transaction, the employee who checked out the book to the patron, and the library card of the patron. some employees have library cards. if an employee patron turns in a book late, the fine that they pay is a percentage of their salary. some employees are authors who have library cards—they are allowed to check out as many books as they like.

One of the benefits of a well designed ergonomic work environment is low operating costs is true or false