Reading Assignment:
  Read the part of 2.5 concerning compound interest, in 
     particular Example 2 on page 49.
  Read 2.6.

  Tomorrow we'll be going through 2.8.  If you get time you
     might want to read through it a little.  If you do, try
     to see a relationship between separable and exact equations.

Problems:
  Section 2.5: 9
  Section 2.6: 3,4,7,9,15,18,22

Remark: 
  The use of the term "critical" in this section is different 
     from that in Section 2.2.