Exercises from Section 3.2 page 155-157:
  Do these problems: 13,14,15,16,21,22.
  To turn in:  13, 14, 21, 22.

Exercises from Section 3.3 page 163-166:
  Do these problems: 2,10,12,14,21,23,27,29,33,34,35.
  To turn in: 10, 12, 23a, 27, 29, 35.

Exercises from Section 3.4 page 171-174:
  Do these problems: 2,5,8,14,16,19.
  To turn in: 2, 8, 14, 16, 19.
    Comment:  For 14, it says to sketch the graph.  
    But instead plot it with a computer on an interval like (-2,2).
    Use fooplot or Grapher.app or Matlab or something similar.
    In a sentence describe how the graph differs from e^(rt)?