When a certain monopoly sets its price at $8 it sells 64 units. When the monopoly sets its price at $10 it sells 60 units. The marginal revenue for the firm over this range is
A、$11.;
B、$22.;
C、$33.;
D、$44.
发布时间:2025-11-22 22:27:17
A、$11.;
B、$22.;
C、$33.;
D、$44.