Today is the Chapter 14 Test. Here are the answers to my posted test:
1. DE = 32, EF = 16sqrt(3).
2. TU = 16, US = 8sqrt(3), SK = 8, TK = 8sqrt(2).
3. 3/4
4. 3/5
5. 0.309
6. 0.625
7. 1/2
8. sqrt(3) (Some people may consider this question unfair, since the above question and both corresponding questions on the practice had rational answers, leading students to believe that they can just use a calculator to find the exact value rather than use 30-60-90 triangles.)
9-10. These are vectors that I can't reproduce easily here.
11. BC/AC (or a/b, if the students learned it that way).
12. AB and AD
13. ACD and CBD
14. This is a vector that I can't reproduce easily here.
15. (9, 6)
16. 115 feet, to the nearest foot.
17. (1, 4)
18. (3, -3)
19. (3, 2). (I hope students don't get confused here and solve these three backwards!)
20. This is a vector that I can't reproduce easily here.
Thus concludes Chapter 14. Stay tuned -- we're jumping back to Chapter 8 on Area next week!
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