1. Checking accounts at a local bank carry an average balance of $3000. The bank turns over its balance 6 times a year. On average, how many dollars flow through the bank each month?
2. Due to a turnover, a company hires 150 employees each year, on average. Assume that an average stay of an employee in the company is 5 years. On average, how many employees does
3. VW is a popular sandwich shop on campus during lunch hours. The arrival rate is 40 students/hour from 10 to 11am, 80 students/hr from 11am to 12pm, 100 students/hour from 12 to 1pm, and 10 students/hour from 1 to 2pm. Suppose that there are no students arriving before 10am or after 2pm. Also suppose the arrival of students is uniform within each time segment. The sandwich shop serves students at a constant rate of 50students/hour. What is the maximum number of students waiting between 10am to 2pm?
4. During peak season, sugar beets arrive at a processing plant at a rate of 1500 barrels per hour from 7am to 5pm each day. The processing capacity of the plant is 1200 barrels per hour. If the plant starts to process sugar beets at 7:30am each day, at what time will all the processing work be completed in a day?