John's Surface Area Post

Rectangular Prism


Cylinder



Triangular Prism

1)

(bxh÷2)xh
5x3= 15m÷2= 7.5m
7.5x8.5= 63.75m<sup>3

2)</sup>

<sup>AOBxh
lxwxh
8x20x16 =
2560cm3


3)

(bxh÷2)xh
4x8÷2x6.5
4x8=32÷2= 16
16x6.5= 104cm
104÷8= 13
13x3= 39cm3

4)


V= πr2xh
V= (3.14x6x6)x15
V= 113.04x15
V= 1695.6cm3</sup>

Pythagorean Relationship Scribe

"C" square = "A" square + "B" square
like 2 square is 2x2 and 5 square is 5x5

Find the missing length.

c = a2 + b2

c= 122 + 52

c = (12x12) + (5x5)

c = 144cm2 + 25cm2

c = 169cm2

---- ----

/ c = / 169cm2

c = 13cm2





(c x c) = (a x a) + (b x b)
(c x c) = (8x8) + (6x6)
(c x c) = 64cm square + 36cm square
(c x c) = 100cm square
C square = 100 square
C = 10cm

TextBook Question 12, 15 and 17

12) While shopping online, Ji Hun finds a square rug with an area of 11m2. He needs to know if it will fir in his 4x5 m bedroom.

a)Estimate the side length of the rug to one decimal place.

a) 52 cm

b) Check you estimate with a calculator.

b) 676 mm

c) will the rug fit?

c) 24 cm

15) order the following number from least to greatest: 7, square root 46, 5.8, square root 27, 6.3.

no. the angle is not a right angle. It has to be 10 m for the angle to be right angled

6+8 = 100; = 10

17) carmel wants to mount an 18cm x 18cm square picture on a square board thay is four time the area of the picture.

a) what is the area of the picture?

324 cm

b) what is the area of the board?

1296m

c) what are the dimensions of the board?

36cm by 36cm

John's Scribe Post-Textbook 10, 13 and 14

10) When water freezes, its volume increases

by approximately 10%.

a) By how much does the volume of a) 10

-- = 0.1 0.1x750=75mL

750 mL of water increase when it 100

freezes?

b) What is the volume of ice created? b) 825mL

14) 4% of 100 is the same as 8% of what

number? Explain how you arrived at

your answer.

I arrive at 4% is half of 8% and 50 is half of 100

13) Suppose a real estate agent receives 5%

commission on the fi rst $200 000 of a

house’s selling price, and 6% on the

remaining amount.

a) What does commission mean? a) Commission is the portion of the sale price that the real estate agent earns.

b) If a house sells for $345 000, how

much commission does the real estate

agent make on the sale of the house? b) $18 700

Comment if I did something wrong.

John's Pay It Forward

Part 2

For my pay it forward me and ethan pick up garbage on my street and we had fun picking up garbage.

Part 3

My act of kindness went pretty well because there was garbage all over the street and now we can see it clean. when i see a garbage on the street i will pick it up and throw in the garbage can.

Part 4

When ever people do this, the world is going to be clean and people can make differences by picking up every garbage on the street.

John's Graphing Post

1)
Bar Graph
Advantages: you can easily compare two or three set of data.
Disadvantages: graph categories can be reordered emphasize certain effects.
: can only use with discrete data.

Line graph
Advantages: you can compare multiple continuous data sets easily.
: interim data can be inferred from line graph.
Disadvantages: only use with continuous data.

Pictograph
Advantages: its easy to read
: visually appealing
: handles large sets of data easily using key icons
Disadvantages: hard to quantify partial icon
: icons must be a consistent size
: best for only 2-6 sentences
: very simplistic

Circle graph:
Advantage :A circle graph is best for comparing data from part to whole using percents.
Disadvantage: You can only compare one variable at a time, not the relationship between two variables as you can do with a line graph or some bar graphs.

Double Bar Graph:
Advantage: Best for comparing two sets of data across categories.
Disadvantage: You could get confused by both of them together even if they are in color.

2) Three ways graph can be misleading are

• Distorting the scale

• Distorting the visuals

• Distorting the size of bars

2a) Line graph and Bar graph

2b) Yes I would continue selling pizza sub because the graph is showing that each week the item get higher and higher.

John's Proportion Post

Ratio- a ration is a comparison of quantities that ave the same units. These are some ways of

Example: you have 13 grapes and you give 5 grapes to your friends. It would like this.

13/5 or 13:5

Rate- is a comparison of two quantities measured in different unit.
Example: 23 beats per minute or 23 per/minute

Another example:

Proportion: A proportion states that two ratios are equal.

TASK 2

• 5 hours to travel 360 miles is about _____mph.

• 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.

TASK 3

3/4 = 12/16

4/9 = 16/32

TASK 4

TASK 5

http://www.concurringopinions.com/wp-content/uploads/2011/10/CrimeInAmerica2.jpg

1. No

2.

3.If I were the judge I would give Roy Brown 1 month in jail and give Paul Allen 15 years in jail.