Exercises from Section 2.5 page 88-94: 
  Do these problems:  2, 3, 10, 12, 14, 20, 22, 23, 24.
  To turn in: 3, 10, 12, 22, 23.

Exercises from Section 2.6 page 99-101: 
  Do these problems:  1, 3, 9.
  To turn in: 9.

Exercises from Section 2.8 page 118-121: 
  Do these problems:  1, 3, 7, 9.
  To turn in: 1, 7.
    Comment: #1:  You are NOT asked to solve the equation..... just do what it says.
    Comment: #7: Plot all 4 solutions on the same axes and hand in the printout.
    Compute them analytically first.  Then use Matlab or fooplot.com to plot them.
    Finally, based on a plot with scale -2,2 in each direction, what is the 
    range of t that the best two approximations are visually equal.

Exercises from Section 3.1 page 144-145:
  Do these problems: 1, 4, 10, 12, 17, 22, 24, 27.
  To turn in:  4, 10, 17, 24, 27.
  Comment:  #27:  Note that the ODE is NOT homogeneous.  Don't solve it!
               This is another substitution problem.  You are changing
               variables with the goal of getting a simpler equation.
               Check that your result is more simple.