Answer key to test 3 sample problems

I threw this together rather quickly. I don't mind some feedback but I do not guarantee the accuracy of this answer key. These sample problems are representative of some of the material discussed in class, but may not be fully indicative of what the test will look like. You can also expect some multiple choice as well as written problems that require calculations such as those on the recent homework assignment

1-D, 2-D, 3-B, 4-C, 5-B,
6-B, 7-D, 8-A or B (they are the same), 9-A,
10-A, 11-C, 12-D, 13-C, 14-A,
15-B, 16-C, 17-C, 18-C, 19-B,
20-A