Because a New Employee Must Learn an Assigned Task, the Employee's

Multiple Choice

Because a new employee must learn an assigned task, the employee's production will increase with time. Suppose that for the average new employee, the rate of performance is given by , where N is the number of units completed t hours after beginning a new task. If 3 units are completed after 8 hours, how many units are completed after 80 hours? ​

A) 8
B) 9
C) 10
D) 12
E) 13