What is the concept of a “substitute” in economics?

What is the quantity demanded when the price floor is $0.75 in the market for public transportation? a. 75,000 b. 116,000 c. 0 (zero) d. 100,000 e. 86,000?

Erp has all the following advantages except: modules throughout a corporation can communicate with each other while purchasing is difficult, the vendors such as sap make it worthwhile due to easy implementation have predefined software that represents "pretty good practices" or even "best practices" enables standardized procedures in an organization reduces inconsistent data stored in various locations of the organization

Madalyn works in a career that involves patrolling a warehouse and monitoring the camera alarm system. robert works in a career that involves observing and arresting crime suspects. which career pathway matches each person? a. madalyn works in law enforcement services, and robert works in security and protective services. b. madalyn works in security and protective services, and robert works in corrections services. c. madalyn works in security and protective services, and robert works in law enforcement services. d. madalyn works in corrections services, and robert works in law enforcement services.