Gielh's Surface area and volume post

1) (bxh/2)xh

5x3/2 15/2 = 7.5

7.5x8.5= 63cm3

2) lxwxh

20x8x16= 2 560 cm3

3) (bxh)h

4x8/2 32/2 = 16

16x6.5= 104

104÷8x3 = 39cm3

4) πr2

r=d/2

r= 12/2

r= 6

3.14x6x6= 103. 04

103.04x15 = 1695.6cm3

1)

2)

3)

Video of a Surface Area:

Pythagorean Relationship Scribe

1) Pythagorean Relationship - The relationship between the length of the side of a right triangle. The sum of the areas of the squares attached to the legs of a right triangle equals the area of the square attached to the hypotenuse .

2)

3)

Gielh's Scribe post Text book Questions 5 , 12 , 16

5) Estimate each value to one decimal place .

a)

b)

c)

12) While shopping online , Jin Hun finds a square rug with an area of 11m2 . He needs to know if it will fit in his 4m x 5m bedroom.

a)

B) Estimate : √11 = 3.2

C) Yes it would fit because the side length is 3.3 its smaller than the shorter side of the room.

16) A fitness center will install square hot tub in a 6m x 6m room . They want the tub to fill no more than 75% of the rooms area.

a)

75% of 36 is 0.75x36= 27

27m

B) the fitness center should order dimension of 5.1 by 5.1 because the area does not exceed 75% of the space available

Gielh's home work book questions Scribe post

5) The commission for the sale of a house was 6 and 3 fourths %. IF the house sold for $345 000 how much was the commission?

How I got the answer: I divided 6.75 by 100 then i got the decimal number which

is 0.0675. I multiplied 0.0675 by 345000 then i got 23287. The commission is $23287.

7 a) Miguel Bought a car for $4700. He made a down payment of 19 1/2%. How much was the down payment

How I got the answer : I divided 19.5 by 100 so I got a decimal number which is 0.195. I multiplied 0.195 by 4700 and I got 916.5. So Miguel's down payment was $ 916.50.

b) about 5.6% of Canadians have type 2 diabetes . IF Canada's population is 32 million , About ho

w many Canadians have this Condition?

How I got the answers: I divide 5.6 by 100 so then I got a decimal number which is 0.056. I multiplied 0.056 by 32 million and then I got 1.792 million Canadians have diabetes.

c) the 4900 - seat hockey arena was 63% full. How many people were at the game?

How I got the answer : I divide 63 by a 100 then I got a decimal number which is o.63 % . I multiplied 0.63 by 4900 and i got 3087. So 3087 people .

8)The Nile river is about 209% the length of the Yukon River. If the Yukon River is 3168 km , How long is the Nile River ( to the nearest km?)

How I got the Answer : I Divide 209 by 100 so then I got a decimal number 2.09. Then I multiplied 2.9 by 3168 which is 6621.12 %

*I divided by 100 first because a percent is out of a 100.

Here is a video of how to find a percent of a number :

Hey guys I'm sorry If my writing was bad .

Gielh's Pay it forward

Part 2

What was your Pay It Forward act of kindness?

My friend Carlo Supan and I cleaned his relatives yard.

Why did you choose this activity?

We chose this activity because we wanted to Carlos cousins.

Who did you help?

Me and Carlo help his relatives.

What did you do?

We raked leaves .

When did you do you act of kindness?

We did our act of kindness at the weekend.

Part 3

How did your act of kindness go?

Our act of kindness wen't good because it was fun and also I get to meet his relatives.

What Happened?

When we were cleaning up there yard his relatives was really happy , they were proud of us.

How did you feel?

Carlo and I felt good because we helped his relatives.

How did the person or people react?

Did you ask the person or people to "Pay It Forward"?

We didn't ask his relative to pay it forward.

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

We didn't get to ask his relatives because we were focused on cleaning up there yard and we were having fun when we were cleaning.

Part 4

Why is the idea of "Pay it Forward" important?

The idea of Pay it forward is important because one small thing that you could do to help a person could make a big difference to them. Also the person that you helped could pass it on to another person. Not just here in Canada but also around the world. Even though you worked with 1 or 2 people , It would still make a difference around the world.

Has your act of kindness made a difference?

It made a difference for them because Carlo's relatives are really busy with there jobs and taking of a teenager and a young boy. But it also made a difference for me and Carlo , We now know the importance of making a difference . 1 small thing that you could do it could make a difference to the people that your helping.

Here is the link for our video: http://www.youtube.com/watch?v=OG-pVxHwOck&feature=channel_video_title

Gielh's Graphing post

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

1) Bargraphs is the best for comparing data across categories . But the disadvantage of using the bar graph is that the intervals are hard to identify.

Pictographs are the best for comparing data that can be easily counted and represented using symbols. But the disadvantage is that the pictographs is that pictures are in different sizes.

Double bar graph are the best for comparing two sets

of data. But the disadvantage is the intervals are hard to find and plot it.

Line graph is the best for showing changes over time and it shows the trend. But the disadvantage using a line graph is its hard to plot and the intervals aren't accurate .

Circle Graph graphs are the best for percents and part to wholes. Disadvantage is percents are really close and the categories.

2) how can graphs be misleading . show 3 ways

1)One is that you could put a break on the x-axis


2) Another way if misleading a graph is drawing different sizes for the pictographs.


3) Another way is distorting the graph or scale.

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

I would use a bar graph and a line graph.

2b) I would keep selling pizza subs because as weeks come by the trend is going higher .




4) 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 use the Line graph because it shows the changes over time.

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

Gielh's Proportion Post

Ratio- A ratio is a comparison of two quantities measured in the same unit.

Example: you have a bag of 33 skittles, you pour 20 in your hand . It would look like this

33/20 or 30:20

Rate - A rate is two quantities measured in different units.

Example : The rate at which you type 30 words

perminute. Another example :

Proportion- An equation which sates that two ratios are equal.

Example :

1) 5 hours to travel 360 miles about 72 mph

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

3) what are the three ways you can prove that statements are true?

Here is a video of a proportion statement

1) Does this seem fair? No because he only took 100 dollars . He could of only stayed at jail for 1 month not 15 years .

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?

Its not fair for Roy Brown Because he only took a hundred dollars then he felt guilty and the next day he surrenders to the police . Alexandria should of been jailed for 15 years instead of Roy Brown.

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

If i was the judge i would only put Roy Brown in prison for only a month.