Karl's Surface Area Post

T=lxw 5x10=50m2

F=lxw 6x10=60m2

S=lxw 5x6= 30m2

TSA= 2(T+F+S)
TSA= 2(50+60+30)
TSA= 2x (140)
TSA= 280m2









lxw 5x10=50cm bxh/2
lxw 9x5=45cm 9x8/2
lxw 5x8=40cm =72/2
=36cm2



TSA= 50+45+40+36+36
TSA= 207cm2











d/2=r
8/2=r
4=r


c= pie d
c= 3.14x8
c=25.12mm








lxw
=25.12x12= 301.44mm2

Area of a circle=pie r2
=3.14x4x4
=50.24mm2

TSA = cirlce + circle+ rectangle
TSA= 50.24+50.24+301.44 =
401.92mm2

VOLUME


bxh/2 x h bxh1/2 x h2
3x5/2 v=7.5x8.5=63.75m3
15/2
=7.5m




l . w. h
v= 20 x 8 x 16
v=2560cm3




bxh/2 x h bxh1/2 x h2 3/8= 0.375cm
4x8/2 v= 16x6.5 0.375x104 = 39cm3
32/2 v= 104 cm3
=16cm






d/2 pie.r.r.h
12/2 v= 3.14 x 6 x6 15
6cm v= 1695.6cm3

Karl's Square Root Post

3. List the Perfect squares immediately before and after the whole number.

4. Identify all of the whole numbers

with a square root larger than

5 and smaller than 6.
The whole numbers that are

between 5 and 6 are 26,27,

28,29,30,31,32,33,34,35,36

5. Estimate the square root to one

decimal place. Show your work Check

your answer with a calculator

a) 17

b) 85

Pythagorean Relationship

1. Explain the pythagorean relationship a squared + b squared = c squared

This means that the area of a and the area of b equals the area of c after you square root it.

2. Solve the missing side length

The missing side length is 13 cm

3. Is this a right triangle?!!

Karl's Percent Post 4,8,12

4. Use mental math to find the following.
a) 20% of 60.

To do that I divided 20 by 100 which equals 0.2
0.2 is 1% so I multiplied 0.2 by 60 then I got my
answer.


















b) 250% of 400

To do that I got 100% which is 400 so
I doubled that and got 800 then I divided 100 by2 and got 50% so
I did the same to 400 and got 200
I added it all up and got 250%= 1000.

c) 10 1/2% of 100

To do this I divided 10.50 by 100
and I got o.105 then that's 1% so I
multiplied that by 100 and I got 10.5

8. The original price of a jacket was $84.00 A store manager marked the price down by 25 1/5. By how much was the price reduced.

To do that I divided 100 by 4 which equals
25% and 21 at the other side then I found
!% by dividing 100 by 100 and I got 0.84
so to get half I divided 0.84 which is 0.42
so I added it all together and I got $ 21.42





















12. A manufacturerof electric hybid vehicles claims it's vehicle will travel 200 % as far as it's regualar vehicle on full tank of gas. If the regular vehicle travels an average of 550 km on a full tank, how far will the hybrid go?



To do this I got the 100% which is
550 so I doubled that to get 200%
and I got 1100 so the hybrid car
will travel 1100 km.







Here's a video about finding percent of a number.

Karl's Pay It Forward

Part 1

Pay It Forward is when someoneis helping another person(s) by doing a act of kindness and soon that person will do the same to others.

Part 2
What was your Pay It Forward act of kindness?
Why did you choose this activity?
Who did you help?
What did you do?
When did you do your act of kindness?

What Dom, Oudorn, Nikko and I did for our act of kindness was donating clothes to Value Village.After that we went to Dollarama to buy things to put in our shoebox that we are gonna bring to my church and they are gonna deliver it to Africa for kids to have that's not gonna have anything for Christmas. We choose to do this act of kindness because we wanted to help other people by donmating our old clothes and to help the kids in Africa by giving them some toys in the shoeboxes. We help the kids in Africa. We donated clothes and packed shoeboxes to send to Africa. They did our act of kindness on Sunday and continued it on Monday and I joined because my chicken pox was gone.

Part 3
How did your act of kindness go?
What happened?
How did you feel?
How did the person or people react?
Did you ask the person to Pay It Forward?
How did they react to your request?
If you did not ask the person to "Pay It Forward"?

Our act of kindness went great,We went to Value VIllage to donate clothes and pack shoeboxes to send to Africa for christmas,I felt good because I get to help other people. When we gave the donations to Value Village the girl was saying thank you and we asked her if she would Pay It Forward then she said after she heard what we were doing she said she would Pay It Forward.

Part 4
Why is the idea Pay It Forward important?
Has your act of kindness made a difference?

The idea of Paying It Forward is important because we are helping people that are in need and telling other people to Pay It Forward so they could do it too. I think our act of kindness has made a big difference even though we can't see it we believe that it is going to make a big difference in those kids life in Africa.

And this our video of us Paying It Forward.

Karl's Graphing Post

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

Bar Graph
Advantage-Bar graphs advantage is good for comparing data across categories.
Disadvantage- You cant rearrange the graph, show changes overtime.

Double Bar Graph
Advantage-Good for comparing 2 sets of data over categories and it's easy to tell what your comparing.
Disadvantage-When you use a double bar graph somethimes there to close together that you can't tell the comparison and difference of the bar.

Circle Graph
Advantage-Circle graphs are good for camparing part to whole using percents.
Disadvantage-If the numbers are big and it's hard to compare them to percents you can't use a circle graph specially when ure not good at comparing percents.

Line Graph
Advantage-Is good for showing changes in a data over a period of time.
Disadvantage-Can only be used if the data changes over time.

Pictograph
Advantage- Good for comparing data that can be easily counted and represented using symbols.
Disadvantage- You have to find out what the symbols are worth and it's sometimes hard to tell how much something is when the symbols is not a whole.


2. How can graphs be misleading. Show 3 way

A Pictograph can be misleading if one symbol is bigger than the other

A Bar Graph can be misleading if there was a break in the y-axis

Also a Bar Graph can be misleading if one bar is a different color.

2a) The following chart shows Pizza Sub Sales over a month. What 2 graphs would show the information accurately?
2b) If you were selling Pizza Subs would you continue? How does your graph explain your answer.

2a) 2 graphs that would show this information accurately is a line graph


and a bar graph.

2b) Yes, because each week the sales keep on gettign higher and a line graph would display this data accurately.


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?

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


4.) I would show her the graph on the left because it's showing the changes over the months and that it's getting better not like the other graph it's hard to tell how much it is.




4a)

Karl's Proportion Post

Task 1

Please define
ratio - A ratio shows the relative sizes of two or more values.

eg. Express the ratio of red balls to the black balls. answer 3:4

rate - Compares two quantities measured in different units.

eg.10 km in 5 gallons

proportion -An equation which states that two ratios (fractions) are equal.

eg. Johnny drove 10km in 2hrs how far would he get in 1 hr.

Task 2

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



360 divided by 5 equals 72.

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. You have to increase the orange juice 4 ml.

Task 3

What are the three ways you can prove that equivalent ratio statements are true?3/4 = 12/16 or 4/9 = 16/32

the 4/9 = 16/32 is not an equivalent fraction.

Task 4

Find a video about using proportion and embed it in your post.

Task 5

1. Does this seem fair? No

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 I don't think it's fair because the homeless man only stole 100 and he went to jail for 15 years but this rich guy stole 3 billion dollars and he's only going to jail for 3 years it should be the other way around.

3.What would you have done if you were the judge? If I ws the judge I would send the rich guy to jail for 15 years and maybe the homeless guy put him in jail for a year then after send him to place where they can feed him and cloth him and other thing.