The per-week demand for use of the Golden Gate Bridge in San Francisco is P = 13 - 0.15Q during peak traffic periods and P = 10 - 0.1Q during off-peak hours, where Q is the number of cars crossing the bridge in thousands and P is the toll in dollars. If the marginal congestion cost of using the bridge is MC = 5 + 0.2Q, what is the optimal peak load toll for crossing the bridge?
Select one:
A. 6.5
B. 8.0
C. 8.7
D. 9.9
E. 10.6