Chapter 2, Problem 91RE

Employee training. A company producing computer components has established that, on average, a new employee can assemble N(t) components per day after t days of on-the-job training, as given by

  $N(t)=\frac{40t-80}{t},t\ge 2$

1. (A)   Find the average rate of change of N(t) from 2 days to 5 days.
2. (B)   Find the instantaneous rate of change of N(t) at 2 days.
3. (C)   What should we expect out of long-term employees? Why?