In the ER Diagram for the SUNSHINE AIRLINE COMPANY, which word should replace xxx?

Customers enter the waiting line to pay for food as they leave a cafeteria on a first-come, first-served basis. The arrival rate follows a Poisson distribution, while service times follow an exponential distribution

If the average number of arrivals is four per minute and the average service rate of a single server is seven per minute, what proportion of the time is the server busy? A) 0.43 B) 0.57 C) 0.75 D) 0.25 E) 0.33

Which of the following statements about a master file is false?

A) A master file is conceptually similar to a ledger in a manual AIS. B) A master file's individual records are rarely, if ever, changed. C) A master file exists across fiscal periods. D) A master file stores cumulative information.