Today we worked on surface area, volume, and circumference of a sphere. The questions we worked on were:

1. The surface area of a sphere is 1256 sq. cm. what is it's circumference?

2. The surface area of a sphere is 1256 sq. cm. what is its volume?

1. The volume of a sphere is 7234.56 cubic cm. What is its radius?

2. The volume of a sphere is 7234.56 cu. cm. What is its circumference?

3. The volume of a sphere is 7234.56 cu. cm. What is its surface area?

Also he gave us a few tips for our exam. He said that the question numbered 1, about the radius, is not going to be on the exam, but you should do it anyways. He told us one more thing as well. that in order to get # 2 we were to do # 1 first. Be warned though that we are having to do triginometeric figure reviews tomorrow.

almost forgot, the next scribe is going to be ... donna!

Today's Slides: January 22

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Applied 20S January 22, 2009

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SCRIBE: Dimentions of a Sphere (scale factors)

Hey everybody, in today's class we did some problems one scale factors we also talked a little about QUADRILATERALS - Any 4 sided figure ( Trapezoid, Parallelogram, Rectangle, Rhombus and the Square).

Back to scale factors, Scale factors ALWAYS talks about length. You have to be careful and watch when your doing problems on scale thou because area is NOT length. One of the problems we did was we had to find the area of a trapezoid. In this problem the scale was 1:20 so you would multiply your area by 20 squared not 20 because area is NOT length. Its the same with volume you would multiply it by 20 cubed. An easy way to remember this is

Example :

Length

1:4

Area

1 squared : 4 squared

1: 16

Volume

1 cubed : 4 cubed

1: 64

You also have to remember to indicate your units of measurement and weather its squared or cubed. So for example cm squared, and always remember to show your work.

The slides from today's class are posted below with all the problems we did and the homework assignment.

The next scribe will be RYAN

see yall tomorrow =D

Today's Slides: January 21

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Applied 20S January 21, 2009

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Today's Slides: January 20

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Applied 20S January 20, 2009

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Today's Slides: January 19

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Applied 20S January 19, 2009

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SCRIBE

HI YA'LL!

So we've just learned about how to measure Volume of the late, and in Fridays class we learned how to measure the Surface Area.

S.A (surface area) =4(pi)r-squared

This means in order to find the surface area of any object you multiply 4 by pi (3.14 repeated). Then you multiply total of 4xpi by the surface's area's radius (which is the circumference divided by 2). BUT YOU RADIUS IS ALWAYS SQUARED! If you do not square you radius your answer will be totally off.

that's pretty much it :) .... remember to check out the link that follows to study for exams!

http://webct.merlin.mb.ca/webct/entryPageIns.dowebct

NEXT SCRIBE THE JONATHAN! if your even there .... :P

Today's Slides: January 16

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Applied 20S January 16, 2009

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Volume & surface area of spheres

Hello

We talked about Volume & Surface Area of Sphere.
what we did today is do some questions about volume and surface area, we also looked over the Conversion Table witch showed different measurements converted to other measurements, but the one's that we mostly looked at were 1 inch = 2.54 cm, and 1 mile = 1.61 km.

We first got put in groups of 3 and worked on the questions together.

One question that we did was " A car handbook calls for the oil to be changed every 5000 km, how many miles is that ?

( 1 km = 0.621 mi )


what i did was i used the hint that they gave, and i changed the 1 km to 5000 km, then i multiplied it by 0.621 mi, because every 1 km = 0.621 mi. So then i got 3105 mi for how many miles it had to be before changing it.

When we were done doing the questions, we also got an assignment to do for home work, witch was Pg. 34 and questions # 1 - 5.

Next Scribe is ..... Jonathan!!
because he had to go to somewhere "important" hahah jk bro |^_^|

Today's Slides: January 15

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Applied 20S January 15, 2009

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Today's Slides: January 14

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Applied 20S January 14, 2009

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Today's Slides: January 13

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Applied Math 20S Jauary 13, 2009

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Today's Slides: January 12

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Applied 20S January 12, 2009

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