This is a place for the community of learners in Room 8-73 to learn and enjoy math. It is an extension of the classroom making it accessible 24 hours a day, 7 days a week.

## Thursday, December 22, 2011

### Alex's Percentage post

7a) The population after the second year is 122 because the first year has 110 and 10% of that is 122

7b) because it only goes up by 30% each year

9a) it cost $23736 when arjay bought it

9b) it will cost $26109.6 with the gst and pst

## Wednesday, December 21, 2011

### Jaydin's Scribe Post

a)0.4% b)12% c)115%

### Jason's Percentage Post

## Monday, December 19, 2011

### Nathan's Percents Post

**Percents**

**3**

**1)The commission for the sale of a house was 6 ----- %. If the house sold for**

**4**

**$345 000, how much was the commission? Show your thinking.**

**3**

**Answer: 6 ------% of $345 000 =**

**4**

**6.75**

**÷100 0.0675**

**------ -------- 0.0675**

**x $345 000= $23 287.50**

**1**

**÷100**

**0.01**

**2)What is the percent of each number? Give your answer to the nearest hundredth.**

**245**

**Answer: ------ = 2.45**x

**356.80= $874.16**

**100**

## Friday, December 16, 2011

### Joanna's Scribepost

*note:to change a percent to a decimal, divide the percent by a hundred.*

### Liam's Scribe Post (Percent)

7. A herd of 100 caribou was moved to a new location. The population increased by the 10% in the first year, and increased by 20% on the second year.

a) Find the population after the second year.

100 divided by 10 equals 10

Then add 10 to 100 it becomes to 110.

First year: 110

In the second year

110x 1.20 = 132

The population for the second year is 132.

b) Explain why the percent wasn't 30% increase in two years.

Because 1o% is the increased in the first year and 20% is the increase in the second year.

A.) The Car price went up by $690 so it is now $20,690.20

B.)With tax it is worth 26,059.22

## Wednesday, December 14, 2011

### Cyerra's Scribe Post

**Question 5, Page 148**

**First Year:**

Divide 100 by 10 = 10.

**Second Year:**

110 + 22 = 132 Caribou

**Question 6, Page 148 $38.25**

**Week 1:**

**Week 2:**

### Priya's Percent Scribe Post

4.) Chris purchased the following items:

- 2 binders at $4.99 each
- 1 math set for $3.99
- a backpack for $19.99

Find the total cost including 5% GST and 7% PST.

This is the calculation I did to figure out the final price with taxes included:

4.99 x 2 = 9.98

9.98 + 3.99 + 19.99 = 33.96

33.96 x 0.12 ( add the GST and PST- which makes 0.12 ) = 4.07 ( tax money )

4.07 + 33.96 = $38.03 ( final price, taxes included too.)

13.) A ski jacket has been marked down on three occasions, first 20% off, then 25% off the new price, and finally 50% off the previous price. What is the overall percent saved?

This is the calculation I did to find the overall percent saved:

For example, if the jacket was $100,

100 x 20% ( 0.20 ) = 20

100 - 20 = 80

80 x 25% ( 0.25) = 20

80 - 20 = 60

60 x 50% ( 0.50) = 30

60 - 30 = $30 ( final price )

$100 - $30 = $70

$70 divided by 100 = 0.7 ( 70%) ( savings )

12.) a.) What is 115% of 230?

115% ( 1.15 ) x 230 = 264.50

### Ashton's scribe (textbook pages 148-151)

here is what i did for questions 4,9,&12

video 9

video 12

## Monday, December 12, 2011

### Camille's Graph Post

**Bar Graph**- Th advantages are best for comparing data across categories.

The disadvantages

**Line Graph**-

The advantages are best for showing changes in data over time.

The disadvantages

**Double Graph**-

The advantages are best for comparing two sets of data across categories.

The disadvantages

**Pictograph**-

The advantages are best for comparing data that can be easily counted and represented using symbols.

The disadvantages

**Circle Graph**-

The disadvantages

2. How can graphs be misleading. Show

*3 ways.*

- Uneven Scale
- No title
- No labels

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

**Line Graph**and

**Bar Graph**. Line graph because are the best for showing changes in data. Bar Graph is the best for comparing data across categories.

.

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 choose the Line graph because it looks more impressive.*

.