Question: Demand for rns the following graph gives the total number of help-wanted ads for rns (registered nurses) in 22 cities over the last 12 mo as a function of time t (t measured in months).
A. Explain why n'(t) is positive on the interval (0, 12).
B. Determine the signs of n"(t) on the interval (0, 6) and the interval (6, 12).
C. Interpret the results of part (b).
