Games like "dungeons and dragons," which involve active use of the imagination, have been popular among adolescents for some time. the game could not have risen to its high level of popularity if teenagers were not capable of

Asupermarket has been experiencing long lines during peak periods of the day. the problem is noticeably worse on certain days of the week, and the peak periods are sometimes different according to the day of the week. there are usually enough workers on the job to open all cash registers. the problem is knowing when to call some of the workers stocking shelves up to the front to work the checkout counters. how might decision models the supermarket? what data would be needed to develop these models?