HW Set 4 (assigned Thursday Sept 24, 2009)
Problems for quiz 4 (week of Sept 28, 2009)

Sec 2.8 # 5, 10, 12, 16, 19, 28, 

Sec 3.1 # 15, 25

Sec 3.2 # 3, 6, 12, 19, 27, 39

Sec 3.3 # 2, 5, 11, 16