Applied Math 20

Writing Math Equations in a Post

Mr. D. Sader — Tue, 03 Nov 2009 18:42:51 +0000

Say you are writing a post and want to include a math equation of some kind. HTML or BBcode, won’t help.

You have 2 options:

create the equation using Microsoft Equation Editor (while working in a Word document) then save the equations as png or jpg and upload them to your blog.
activate the WP LaTeX plugin (Dashboard–>Plugins) and insert some latex code from the online LaTeX equation editor.
The following shortcode will produce this LaTeX image:

Similarly, this y=\sqrt{(x+3) a^2+b^2}
will produce this:

Graphing Non-Linear Equations – Online

Mr. D. Sader — Mon, 21 Sep 2009 04:33:55 +0000

I stumbled onto an online function grapher that pumps out nice looking graphs of non-linear equations:

I used a screen grab (Command+Shift+4 on a Mac), saved, and renamed the picture and uploaded it to this blog’s media library.

I haven’t figured out how to print and upload screen caps using the T-83, yet. I’ll need to download software, which at home is simple enough, but the iMacs in the lab won’t have the Connect Software.

Anyway, graphs such the above example have some advantages over the T-83 graphs, I figure.

Weather Maps

Mr. D. Sader — Tue, 15 Sep 2009 19:38:29 +0000

Look at the weather map on page 48. Could it be smaller? Seriously. There is an even more indecipherable example in the teacher’s guide, which when photocopied is just plain impossible to see anything.

So, here’s an up to date Environment Canada weather map from http://weatheroffice.gc.ca/model_forecast/index_e.html

September 15, 2009 atmospheric pressure measured in hectopascals (hPa)

Example questions:

What is the lowest pressure in Canada predicted by this map?
What is the highest pressure in Canada predicted by this map?
What are the atmospheric pressures in Vermilion, Toronto, and Victoria?

How to calculate percentage increase?

Mr. D. Sader — Mon, 14 Sep 2009 19:40:12 +0000

If you start with some stuff, then later you have more or less stuff, what percentage did the amount of stuff you have change?

Comparing two numbers by describing its “percentage increase/decrease/change” is a common math skill.

Now keep in mind that to an English student the words “increase” and “decrease” are obviously opposite, but to a Math student the words can mean the same thing – a negative increase is equivalent to a positive decrease.

If you start with 40 “stuff” and end with 20 “stuff” would you describe it as a 50% decrease or a -50% increase?

http://www.ehow.com/how_4449676_calculate-percentage-increase.html

http://www.marshu.com/articles/calculate-percentage-increase-decrease-percent-calculator.php

http://www.tellmehowto.net/howto/calculate_percentage_change_6409

http://www.ask.com/questions-about/Calculate-Percentage-Change

Sample Answer #2 page 14

Mr. D. Sader — Thu, 03 Sep 2009 23:49:22 +0000

Answer #2 page 14

Glyphs Project Example

Mr. D. Sader — Thu, 03 Sep 2009 22:31:00 +0000

Glyphs Project

Mr. D. Sader — Thu, 03 Sep 2009 02:59:07 +0000

Have a look at the Glyphs project from the Applied Math 11 project book.

Pick your partner.
Pick your topic.
Plan your project.

Look at the timeline for Topic 1. When is it due?

What day next week will be a work on project class. What will you need to do to prepare?

In 8-10 days, what will your final project be about and what will it look like? What will we be able to hang on the walls?

Leave a comment summarizing your decisions so far about the project.

Homework Assignment Hint

Mr. D. Sader — Wed, 02 Sep 2009 04:09:01 +0000

Someone asked me how many books we could buy for $14000 in one of the problems in Tutorial 1.1, but the way we looked at the linegraph, we were trying to price out 14,000 books. Holy Smokes!!!

Simply find $14,000 on the y-axis, look across at the red line then down to the x-axis … there’s the number of books.

We’ll try to do the best thinking we can with the problems raised tomorrow.

Another tip, the data from a graph may have once been in a table/spreadsheet, put it back and you may see a pattern there as well.

Thanks for sharing texts for the first day, should have new ones tomorrow from BSS in Wainwright.

Looking ahead, does everyone have a graphing calculator?

Course Outline

Detailed plan and timeline for Topic 1: Graphing and Design