Answers Section 4.1:

2. 2
4. -1/2, 2
6. 7
8. 3
10. 1
38. $4535.15
42. $597.81

Answers to Section 4.2:

6. $349.03
8. $10,257.92
12. -1
22. 1320.7 M
32. $1.40