The restriction x11,x12, x21, x22 ≥ 0 in the model means: a. Each decision variable must be positive in the optimal solution.
b. Each decision variable must be nonnegative in the optimal solution.
c. x11+ x12 + x21 + x22 ≥ 0
d. All of the above
e. None of the above

For each of the following users of financial accounting information and managerial accounting information, specify whether the user would primarily use financial accounting information or managerial accounting information or both: 1. sec examiner 2. bookkeeping department 3. division controller 4. external auditor (public accounting firm) 5. loan officer at the company's bank 6. state tax agency auditor 7. board of directors 8. manager of the service department 9. wall street analyst 10. internal auditor 11. potential investors 12, current stockholders 13. reporter from the wall street journal 14. regional division managers

Gary lives in an area that receives high rainfall and thunderstorms throughout the year. which device would be useful to him to maintain his computer?

During the holiday season, maria's department store works with a contracted employment agency to bring extra workers on board to handle overflow business, and extra duties such as wrapping presents. maria's is using during these rush times.