Question

the Ponchatrain Bridge is a​ 16-mile toll bridge that crosses Lake Ponchatrain in New Orleans.​ Currently, there are 7 toll​ booths, each staffed by an employee. Since Hurricane​ Katrina, the Port Authority has been considering replacing the employees with machines. Many factors must be considered because the employees are unionized. ​ However, one of the Port​ Authority's concerns is the effect that replacing the employees with machines will have on the times that drivers spend in the system. Customers arrive to any one toll booth at a rate of 12 per minute. In the exact change lanes with​ employees, the service time is essentially constant at 4 seconds for each driver. With​ machines, the average service time would still be 4 ​seconds, but it would be negative exponential rather than​ constant, because it takes time for the coins to rattle around in the machine.

For the​ "Exact Change​ Lane" with employee

The average time driver spends waiting to pay the toll ​=_________seconds​ (round your response to two decimal​ places).

Answer 1