NOTICE : While I would like to help each person who writes looking for help with their math problems I simply don't have the time required to help each and every person looking for help. So, since I can't answer all of them, I've decided that I can no longer answer these kinds of emails.
If you need help with your math problems I would suggest using
MathNerds or
Dr. Math. Both of these are free math help sites that help with pretty much all levels of mathematics. Also, in the interests of full disclosure I feel that I should also mention that I do much of the programming for MathNerds.
I try to answer all email sent my way, but please understand that sometimes time gets away from me and I'm not always able to answer all emails.
If you are contacting me about a typo please include the course notes, section and Example (if applicable) which has the typo, or if are reading the pdf version a page number would be helpful. I'm very appreciative of any typo notification, but getting (and I've gotten a couple of these...) "the 14 in Example 2(b) should be a 12" with no other identifying information makes it a little hard to track down the typo.