Jeremy`s Surface Area Post and Volume Post

The net of a rectangle.

How to find the surface area of a rectangular prism
The net of a triangle.

How to find the surface area of a triangular prism.

The net of a cylinder

How to find the surface area of a cylinder

Jeremy's Scribe Post: Homework Book Pg. 28,29 #4,8,9,10

4. 26,27,28,29,30,31,32,33,34,35.

8. 15 small squares are along one side.

9.

a. 7.7 m

b. Yes, she has enough. If each side is about 7.7 m, multiply that by 4 to get 30.8. 30.8 is less

less than 32 m.

10. The maximum size of the rug should be about 14.4 m²

1)

This Pythagorean Relationship means that the sum of the areas of the two shortest sides of a right angle triangle (a and b) must always be equal to the area of the hypotenuse (c).

2) Solve for the missing side length.

a^2+b^2=c^2

12^2+ 5^2= c^2

144+ 25= c^2

169=c^2

root 169= root of c

13cm = c

the hypotenuse equals to 13cm.

3) Is this a right triangle? Prove it!!!

a2 +b2= c2

8cm2+6cm2= 11cm2

(8 x 8) + (6 x 6)= (11 x 11)

64+36=121

100 =/121

Yes, this can be a right triangle because c2 is larger than a2 and b2.

Jeremy's Percent Scribe Post

Pg. 37

3. a) 1/4, 0.25, 25%

b) 3/8, 0.375, 37.5%

c) 1/2, 0.50, 50%

d) 4/5, 0.80, 80%

Pg. 38

1. To represent a percent greater that 100% you would, shade more than one hundred grid.

2. To represent a fractional percent greater that 1% you would, shade squares from a hundred grid to show the whole number and part of one square to show the fraction.

3. To represent a whole number you would, shade squared on a grid of 100 squares called a hundred grid.

4. To represent a fractional percent between 0% and 1% you would, shade part of one square on a hundred grid

a) There are 144 boxes shaded so the percent would be 144%

b) There are 2/3 of a tile shaded so the percent would be 0.7%

c) There are 88 tiles shaded and 8 smaller tiles shaded on 1 box so the percent would be 88.8%

5. a) There are 144 boxes shaded so the percent is 144%

b) There are 2/3 of a tile shaded so the percent is 0.7%

c) There are 88 tiles shaded and 8 smaller tiles shaded on 1 box so the percent is 88.8%

MATH QUESTION.

22% of 80=

20% = 16% =

1% =0.8

1% =0.8

1% =0.8 = 1.6

16+ 1.6= 17.6

Sorry there's no pictures! The other one that I did, didn't publish and I just saw it this morning.

Jeremy's Pay it forward

PART I

Pay It Forward is a movie all the grade 8's watched. It was about this kid, his name is Trevor who had to do a project in Social Studies. The teacher wanted them to make a difference to the world. He thought of the system "Pay It Forward." It is a system that simply requires one individual, they just have to help three people and to re-pay the person that helped the three people just have to help three more people, each.

PART II

My Pay It Forward act of kindness is cleaning up sidewalks and yards in the neighborhood. Me and a couple of my friends chose this activity because even though it's simple, we're still helping the community. We were supposed to volunteer at Siloam Misson, but there were some problems. Me and my friends helped out lovely and kind people, we would've done more but we only did 3 houses. We got some rakes and started raking leaves. At the end, we had over seven garbage bags full of leaves. It was very tiring but in the end, it was worth it. I did my act of kindness on Saturday, November 12, 2011 1:30 - 3:45 pm.

PART III

My act of kindness went fantastic! It was really tiring but it's all good, as long as we help the community. We raked leaves and picked up garbages, it wasn't well done, but it was done. I felt happy knowing that I've helped people out and those people will help others. They were kinda confused at first, but when we explained what we were doing. They let us clean their yards. Yes, we asked them to " Pay It Forward " they were confused what paying it forward meant. We explained what it meant, and they said " yes. " they're gonna do it.

PART IV

The idea of Pay It Forward is important because it if everyone participates, we would end up helping everyone in the world. That means, everyone gets along and that would bring peace to the world. My act of kindness definitely made a difference.

Jeremy's Graphing Post

1) Use your notes to list the different types of graphs. Please list the advantages and disadvantages of each graph.

a. Circle Graph

Advantage: Shows percent of total for each category.
Disadvantage: No exact numerical data.
b. Line Graph

Advantage: It can compare multiple data sets easily.
Disadvantage: Use only with continuous data.
c. Bar Graph

Advantage: Can easily compare two or three data sets.
Disadvantage: Graph categories can be reordered to emphasize certain effects.
d. Pictograph

Advantage: It handles large data and it sets easily using keyed icons.
Disadvantage: It's hard to quantify partial icons.

2) How can graphs be misleading. Show 3 ways.

• Putting a break on the Y-Axis

• Distorting the visual

• Distorting the size of bars

3a) The following chart shows Pizza Sub Sales over a month. What 2 graphs would show the information accurately?

A line graph and a bar graph would show the data accurately.

3b) If you were selling Pizza Subs would you continue? How does your graph explain your answer.

Yes, I would continue selling Pizza Subs. This is my answer because when I look at it, it shows me that they are selling more and more every week.

4a) Below you see 2 different examples of graphs showing healthy choices sold at the canteen. If you had to convince Mrs. Mota that we should continue selling healthy choices which graph would you choose?

I would convince Mrs. Mota to use the Line Graph.

4b) Change each graph so that your information looks even MORE impressive. You may not change the data just the graphs.

Go to this link http://www.shodor.org/interactivate/lessons/MisleadingGraphs/ to help you understand more about misleading graphs.

and here's a video for you guys to help you learn more about misleading graphs

Jeremy's Proportion Post

Ratio - The quantitative relation between two amounts showing the number of times one value contains or is contained within the other.

Ex. 6 to 9, 6:9, 6/9

Rate - A comparison of two quantities measured in different units.

Ex. 15 to 20 or 15:20

Proportion - An equation which states that the two radius are equal.

1) 5 hours to travel 360 miles is about 72 mph

2) As a playgroup worker, if I increase the amount of apple juice I am serving at the playgroup from 25 ml to 100 ml, how much should I increase the the orange juice to, to keep the quantities in the same proportion? The orange juice is 50 ml to start with.

3) What are the three ways you can prove that equivalent ratio statements are true?

3/4 = 12/16

You can multiply the top left number to the bottom right number. You can also do it diagonally, horizontally , and vertically.

4)

5) 1. Does this seem fair?

I don't think this is fair at all.

2. With what you know about proportion look and read what is in the image above. Does it seem just and fair? Why have you made this choice?
No, it's not fair. I made this choice because the first man stole $ 3 billion and was sentenced for 40 months in jail. And, the other guy stole a hundred dollar bill because he was very hungry and needed somewhere to stay. The next day, he felt guilty and surrendered himself. He was sentenced for 15 years in prison.

3. What would you have done if you were the judge?

If I was the judge I would charge the guy that took $3 Billion, 15 years to jail. I would let the homeless man go and give him $100 so he could have somewhere to stay and eat.

Here are links for you guys, to help you out with proportions.

http://www.arcademicskillbuilders.com/games/dirt-bike-proportions/dirt-bike-proportions.html

http://www.ezschool.com/EZSheets/Number_Sense/Ratio/

I hope this helps all of you guys!