raeesa's surface area and volume post

How to find the surface area of a:

- triangular prism

- and a cylinder-rectangular prism

Triangular Prism:

b times h divided by 2

TSA: 36+36+45+50+40

TSA: 207 cm squared

Rectangular prism:

TSA: 2(T+F+S)

TSA:2(60+50+30)

TSA: 2(140)

TSA: 280 m squared

Cylinder:

TSA: circle+circle+rectangle

TSA: 50.24+50.24+301.44

TSA= 401.92 mm squared

WEBSITES:

http://www.teacherschoice.com.au/maths_library/area%20and%20sa/area_9.htm

Volume:
To find the volume of a triangular prism you use the formula Base times Height divided by 2 times the height.
for example 6cm times 3cm dived by 2 times 13cm.you would first times 6cm by 3 cm which is 18cm then divide 18cm by 2 which is 9cm
the you would go 18 times the height which is 13 and you would get the number

234 cm cubed

Volume of a cylinder?

The formula you would use is pie r squared

Volume of a rectangular prism?

Formula length times the width times the height.

how to find out a volume with a fraction?

you would first find the volume by base times height divided by two times the height.

then when you get your final answer you would convert your fraction into a decimal and multiply your total answer by the decimal to get your final answer.

Raeesa's Square Root Answers #-5,12,and 17

17)a,b,c

12) a,b,c.

c- yes because the side lengths of the rug is shorter than both side lengths of the room.

5) a,b,c.

http://www.youtube.com/watch?v=iGJzW7iC5no&feature=related

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!!!

a^2 +b^2= c^2

8cm^2+6cm^2= 11cm^2

(8 times 8) + (6 times 6)= ( 11 times 11)

64+ 36=121

100 =/121

No, this is not a perfect right triangle because a^2 + b^2 is not equal to c^2.

raeesa's we day experience!!

my we day experience was amazing, I had a lot of fun, and I heard a lot of great motivational speeches. one thing that really caught my attention was many children go to bed starving and hurting inside because they have no food,water, no place to call home. Instead they work all day long hours doing work they are forced to do, instead of being a kid, and hanging out with friends.

Also today millions of young people are denied their right to an education,health care,security,and their inherent right to life. which I think is really wrong.

The speaker that really inspired me the most was Spencer West, he inspired me the most because at a young age he found out from the doctors that he might never be able to walk again. Spencer heard that but new that just because he would never be able to walk again doesn't mean he should give up in life. So he kept going in life just like you and me, he tried to make his story about his legs funny so people would understand it doesn't matter what you look like or your story we are all the same,and we should all be treated equally.

To me Spencer's speech really spoke to me more.

I think that after that experience I do believe that we are the change people have been waiting for,and we can make a difference no matter how big or how small, we can all do it one step at a time.

I believe if we can make a difference just by helping others out of the good of our hearts you can do it to.

Remember the vow of silence is more than just a symbolic act of solidarity. By collecting pledges from your friends and family, you will support Free The Children's developmental projects in communities around the world. also every pledge you collect makes a positive difference in the country you are supporting, even after 24 hours of silence are over.

Lastly from this We Day experience I hope to get more active and get to participate in more life changing events like the me to we concert!!!

Raeesa's homework answers number's 3,7,and 11.

3) Use mental math to determine each of

the following..

a)300% of 2000=

I did 300/100=3

3 times 2000=6'ooo

b)1 1/4% of 60= 0.75

% #

100 60

1 0.6

1/4 0.15

____________

1 1/4 0.75

c) 0.1% of 40=0.04

0.1/100=0.001

0.001times 40=0.04

7. Two hundred tickets are being sold for a

school draw.

a) What is your chance of winning with

one ticket? Express your answer as

a percent.

b) How many tickets would you need

to purchase to have a 2.5% chance

of winning?

answer a)=1/200 divide the numerator by the denominator by 2.

so 0.5/100=0.5%

B) 0.5% times 5 = 2.5%

so you would need 5 tickets to have a 2.5% chance of winning.

The area of Canada is approximately

9 984 670 km2

. The area of Manitoba

is about 6 1/2% of the area of Canada.

What is the area of Manitoba to the

nearest square kilometre

answer= change the 6 1/2 t0 6.5 because 1/2 is the same as 0.5.

so then 6.5 times 9 984 670= 64'900'355 km2

the area of Manitoba to the nearest square kilometre is 64'900'355 km2.

-sorry that I had no pictures, but it wouldn't upload..

-here is a link to help you guys practice how to find a percent of something...

http://www.themathpage.com/arith/percent-of-a-number.htm

here is a video of how to find a percent of something!

http://www.youtube.com/watch?v=2rr-IXInEVc

Here are the answers to question's 3,7,and 11, I didn't have any pictures because it would't upload sorry, but I hope this helped you guys.

Raeesa's Pay it Forward

Part 1-What is "Pay it Forward"

Paying it forward is a concept that involves doing something good for someone in response to a good deed done on your behalf or a gift you received. However, when you pay it forward, you don't repay the person who did something nice for you. Instead, you do something nice for someone else. For example, if someone changes your tire while you are stranded on the highway, you might pay it forward by shoveling your elderly neighbor's walkway after a snow has fallen.

The concept of paying it forward comes from a 2000 movie Pay It Forward, starring Kevin Spacey and Helen Hunt. In this movie, a young boy, played by Haley Joel Osment, is given a school assignment that requires him to find some way to change the world. He develops the pay it forward concept, setting forth a chain reaction of good deeds.

Part 2-What was your Pay It Forward act of kindness?I babysat for free,and I helped an elderly.

Why did you choose this activity? I chose this activity because i didn't know what to do at first,and my idea was not following through.So then i thought of helping someone close to me that needed some help.

Who did you help?My old auntie ,and and my other auntie and uncle.

What did you do?I helped my old auntie around the house doing some chores and helped her set up her Christmas decorations. After helped babysit my little cousin for my auntie because she was not feeling well over the weekend ,and my uncle had to go to work.

When did you do you act of kindness? I did my act of kindness November 12,and November 13.

Evidence is at the bottom of this post....

Part 3-How did your act of kindness go? My act of kindness went really well.

What Happened? What happened was I first went over and babysat my little cousin on Saturday. Then I went over and helped my old auntie decorate and clean on Sunday.

How did you feel?I felt really good to see the smiles on there face when I went and told them that I would help them out on my Saturday, and that I didn't want anything in return.

How did the person or people react? They were very excited that I would take up my weekend to help the out

Did you ask the person or people to "Pay It Forward"? Yes I did ask the person to pay It forward.

How did they react to your request?They were very surprised.

If you did not ask the person to "Pay It Forward" how come?

Part 4-

Why is the idea of "Pay it Forward" important? I think that pay it forward is important because helping someone out of the good of your heart for nothing in return but for the other person to pay it forward, it is very special because if you can pass on this very good deed then you have no idea of how much people that you have helped, and in return you get the satisfaction of the good thing you have done.

Has your act of kindness made a difference?I think my act of kindness will make a difference because they said they will try and pay it forward in the future.

Here are some inspirational quotes.

“Be the change you want to see in the world.” Ghandi

“If you can’t feed a hundred people, then just feed one.” Mother Teresa

“Together we can change the world, one good deed at a time.”

these quotes are from:http://payitforwardday.com/inspire-me/inspiring-quotes/

Raeesa's Graphing Post

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

1a)Bar Graph- this graph is good for comparing data across categories.

Advantages: compares data across categories

Disadvantages: it can only compare one set of data and depending on the intervals, it can be inaccurate

2)Double bar graph- this graph is good for comparing 2 sets of data across categories.
Advantages: it compares two sets of data across categories
Disadvantages: it can only compare a couple of data and depending on the intervals, it can be inaccurate

3)Line graph-this graph is good for showing changes in data over time.
Advantages: it compares changes in data over time

Disadvantages:the types of data mostly used are the ones that had changed over time

4)pictograph-this graph is best for comparing data that can be easily be counted and represented using symbols.

Advantage: it compares data that can be easily counted and represented using symbols

Disadvantage: when the symbols are cut, you can't tell how much of the symbol they have taken off

5)Circle Graph

circle graph's are best for comparing categories to the whole using percents.

Advantage: it compares categories (parts) to the whole using percents
Disadvantage: it takes a long time to make and very complicated to construct

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

• Putting a break on the y-axis
• Distorting the visuals (making a visual,symbol larger than the rest)
  
• Distorting the the size of a bar (making a bar wider,putting more area inside a bar.

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

3b. If you were selling Pizza Subs would you continue? How does your graph explain your answer.
Yes, I would continue selling Pizza Subs, because when I look at my graph, it shows me that they are selling 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 choose the line graph because it looks like the canteen is selling more each month.

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

Raeesa's proportion post

Ratio: The relation between two similar magnitudes with respect to the number of times the first contains the second.
Ex: 6 to 9 , 6:9 and 6/9

Rate: A ratio that compares two quantities measured in different units.

Ex. 15 to 20 or 15:20

Proportion: Comparative relation between things or magnitudes as to size , quantity , number , ratio.

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

÷2
h 5 1
---- ----- = -----
m 360 72
÷2

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.

x4
aj 25ml 100ml
---- --------- = ----------
oj 50ml 200ml
x4

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

3/4=12/16 diagonally (multiply top left and bottom right) vertically, and horizontally.

Here is a video to help you guys out..

4.http://www.youtube.com/watch?v=P_aQPxr2G_4

question 5:

1. do I think its fair? No

2. I don' think its fair because the guy that stole $3B he only got 3 years and the other guy stole $100,told the police about it, and he got 15 years.

3. If i was the judge i would have gave the guy that stole $100 3 years, and the other guy that stole $3B 15 years.

here are 2 links for you guys to practice about proportions and ratios.

http://www.shodor.org/unchem/math/r_p/index.html

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

I hope the links helped you!!