Suppose that you are the vice president of marketing for Target, the large retail store chain. You want to keep your website and in-store services current with technological advances. You would be experimenting with the next expected development in mobile technology, which is A. wireless payments from mobile devices. B. location-based social media applications. C. mobile devices completely replacing desktop and laptop computers. D. devices that block smartphone usage in retail stores. E. all of these.

Pressure systems, inc., manufactures high-accuracy liquid-level transducers. it is investigating whether it should update certain equipment now or wait to do it later. if the cost now is $200,000, what will the equivalent amount be 3 years from now at an interest rate of 10% per year?

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.

In north korea, a farmer’s income is the same as a dentist’s income. in a country with a mixed or market economy, the difference between those two professions might be more than 5 times different. how can you explain the fact that individuals doing the same work in different countries do not earn comparable salaries?