Dave's contact info

Hi all - they're going to turn off my clark.edu email address at some point soon, so here's some ways to get in touch with me if you need to:

503 / 686 - 5040 is my cell phone. I generally keep the ringer off, and check my voice mail a couple of times a week, but there it is.

dafpdx@gmail.com is another email address that I see almost every day. Identify yourself as a Clark student to help situate me...

I hope everyone's enjoying their summer, and good luck in your future math career!

-Dave

Key for Log practice

Here's a link to a funny Youtube video of cute cats.

Ha! No no, just kidding - here's the link to the key to the practice on logs. Good luck and see you Saturday!

https://docs.google.com/viewer?a=v&pid=explorer&chrome=true&srcid=0B8MSB3tEywM5Mzk3MTM0MDItMDZlMi00NmMxLWJjMTYtN2VkNTQxZjViY2Y5&hl=en_US

Quadratics and Parabola practice KEY

Hi all - here's the key to the practice on quadratics and parabolas:

https://docs.google.com/viewer?a=v&pid=explorer&chrome=true&srcid=0B8MSB3tEywM5OWIzNjkzNGEtNWJmNy00YzIwLTk5M2MtYTc1NzBkOWYzYmRk&hl=en_US

Log practice link

Hi all - here are some questions to practice for the final with about logs. It's kind of a lot of questions, I know.

I'll post the key to both this and the quadratics practice Tuesday afternoon - look for them to be posted before 5pm.

Good luck, and see you Saturday,

-Dave

https://docs.google.com/viewer?a=v&pid=explorer&chrome=true&srcid=0B8MSB3tEywM5ZTBjM2RmYmQtNDk0NS00NzkwLWE2YjctMDZjN2IwMTQ2YjMx&hl=en_US

Class for June 4th

Hi all - whew! It's been a long term, hasn't it? Keep the math energy up for one more week.

Today we talked about solving equations involving logs, and graphing parabolas using the intercepts and the vertex. In other words, we finished chapter 11 and looked at a tiny bit of section 10.4.

Keep in mind as you read section 10.4 that the book does a different kind of thing than we do on graphing parabolas. Look at objectinves 10.6 and 10.7 on using the vertex formula, and don't worry about anything involving completing the square, or transformations.

I've posted a link to the activity on graphing parabolas, and I'll post a link to an activity on logs tonight or tomorrow. Tuesday night I'll post links to the keys for both of these, too.

Next week I'll take homework questions and review anything you like from 9am - 10am. Bring your questions! At 10am I'll give the final exam, and then we'll be done, and can breathe clear and easy until our next math class.

For some homework problems:

10.4: 55-73 odd, and 85-93 odd

Chapter 11 test (pages 1079-1080): 1 - 45 all

Good luck, and see you next week!

-Dave

Practice questions on graphing parabolas

https://docs.google.com/viewer?a=v&pid=explorer&chrome=true&srcid=0B8MSB3tEywM5ZDhmYmI4ZWItZDA0MS00NzNhLWIwMDAtYjFiZTU5YTQ2MDg5&hl=en_US

Class Saturday, May 28th

Hi all - in the morning, we took the exam. How'd it go?

Then in the afternoon we discussed sections 11.5, 11.6 and the start of 11.7. Check out the homework for what I expect us to know and do.

The main secret is that logs undo exponential functions. So if I have b to the x equals y, that is the same equation as log-base-b of y equals x. It's confusing. The first problems, translate the log form into the exponential form and see how it looks that way - I might not know what log-base-5 of 125 is, but I know if I set up 5^x = 125 then x must be 3, and those are the same math object in different form.

Tomorrow (Monday) I'll post the first half of the practice for the final - on quadratics and graphing parabolas. We haven't discussed some of that yet, but we will next week (and this is the part tat I have the key already written for...) I'll post the rest of the final practice on logs, and the keys to both part, later in the week (certainly before class on June 4th).

Next week we'll finish up logs, talk about graphing parabolas, redo the exam we took today, and review for the final. It's bound to be a big exciting day!

Here's the homework for next week:

11.5: 1 - 5 all, 13 - 109 EOO

11.6: 1 - 5 all, 15 - 67 EOO

11.7: 17 - 37 odd