2. T
3. F
4. F ("marginal cost" means "instantaneous cost per item"--i.e., the derivative of the total [cumulative] cost function)
5. T
1. a
2. d
3. a
4. d
5.
6. 0.5
7. d
8. a, c, d
9. c
10. a
11. b
12. b
13. d
14. b
15. c
16. b
17. a
18. b
19. c
20.
