HW Problems

Chapter 9 hw:  
    
#1-4, 7, rev #1, 
39, 41, rev #2, rev #3,  
    from chpt 8: pg 455 #20 & pg 462 #32, 
    pg 513: #25 parts (a)-(d) - for (d) do both "x" & prop way -  
    should get same answer!

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