1. .8
2. .00023
3. 9 · a + 3 · a = 12
· a
4. 2 3/5
5. 11/20
6. -.024
7. 8 - n
8. .0025
9. 9.5%
10. A few answers are 241/1000
242/1000
. . . 249/1000
11. 2.8 x 10-5
12. $68
13. 40
14. 5.458
15. 9
16. 160
17. 5 X 10-1
18. 5,280