%%%%%'s Rate Growing Post

The Definition for Rate:
Rate is when you are comparing twosets of data that are measured in different units.

The Definition for Ratio:
Ratio is when you are comparing two sets of data from the same unit.

What is the difference between ratio and rate?
Rate compares two different units while ratio compares data from the same unit.

Question 4 from P60.

4. Determine the unit rate in each situation.

a) An orca swims 110 km in 2 h.
Divide both numbers by 2.

b) A Canada goose flies 800 km in 12.5 h.
Divide the numbers 800 and 12.5 by 12.5

c) Cathy plants 45 daffodils in 30 min.
Divide by 30

Question from P61

14. Conversion rates among currencies vary from day to day. The numbers in the table give the value in foreign currency of one Canadian dollar on one particular day.

Canadian	U.S.	Australian	European Union
1.00 Dollar	0.8857 dollars	1.1527 dollars	0.6940 euros

a) What was the value of $600 Canadian in euros?







x600

Euros	Canadian
0.6940	1.00
$416.40	$600

b) What was the value of $375 Canadian in U.S. dollars?







x375

U.S.	Canadian
0.8857	1.00
$332.14	$375

c) What was the value of $450 Canadian in Australian dollars?







x450

Australian	Canadian
1.1527	1.00
$518.72	$450

PART 2

These are the Grade 8 ingredients for Spaghetti Sauce. This recipe serves 4 people.

1) What would the recipe look like if it had to serve 10 people? Show your calculations.

Ground beef - 0.5 x 2.5 = 1.25 lb

Medium onion, diced - 1 x 2.5 = 2 1/5
Stalk celery finely sliced - 1 x 2.5 = 2 1/5
Clove Garlic, minced - 1 x 2.5 = 2 1/5
Canned tomatoes, chopped - 14 x 2.5 = 35 oz
Can tomato paste - 0.5 x 2.5 = 1.25
Parsley - 1 x 2.5 = 2 1/5 tsp
Basil - 1.5 x 2.5 = 3.75
Oregano - 1 x 2.5 = 2 1/5 tsp
Sugar - 1 x 2.5 = 2 1/5 tsp
Worcestershire Sauce - 0.5 x 2.5 = 1.25 tsp
Seasoning Salt - 0.5 x 2.5 = 1.25 tsp
Bay Leaf - 1 x 2.5 = 2 1/5

2) What would the recipe look like if you had to only serve 1 person? Show your calculations.

Ground beef - 1.25 ÷ 10 = 0.125
Medium onion, diced - 2.5 ÷ 10 = 0.25
Stalk celery finely sliced - 2.5 ÷ 10 = 0.25
Clove Garlic, minced - 2.5 ÷ 10 = 0.25
Canned tomatoes, chopped - 35 ÷ 10 = 3.5
Can tomato paste - 1.25 ÷ 1o = 0.125
Parsley - 2.5 ÷ 10 = 0.25
Basil - 3.75 ÷ 10 = 0.375
Oregano - 2.5 ÷ 10 = 0.25
Sugar - 2.5 ÷ 10 = 0.25
Worcestershire Sauce - 1.25 ÷ 1o = 0.125
Seasoning Salt - 1.25 ÷ 1o = 0.125
Bay Leaf - 2.5 ÷ 10 = 0.25

Devin's bob2

The mistakes I made on my test was I didn't check my answers correctly another mistake was I didn't explain my answers properly.

The two questions I had trouble with is question 15 and 16, In question 15 you had to write the ratio's in lowest terms?The second question was,You have a bag with one white ball,six red balls,eight green balls,and three purple balls in lowest terms,what is the ratio of red balls to the whole bag of balls?

What I can do in the future for my test are working harder,studying a bit more,and reading the questions carefully.

sorry its late.

Four4'sQuestion: How is 4/4 the same as 4÷4?

Answer:4/4 is exactly the same as 4÷4.
The symbols "/" and "÷" represent the same thing, which is divide.
But "/" is most likely used when dealing with fractions.
But the proper way to represent it is using "÷" because some people can mistake "/" for a fraction!

Bob 2

Matthew Bob



http://www.flickr.com/photos/smigol/2645654371/

Part to Part Ratios
Green:Red
7:7

Blue:yellow
1:5

Red:Yellow
7:5

Three-Part Ratios


Blues to Yellows to Greens
1:2:5

Reds:Blue:Yellows
3:5:2

Part-To-Total Ratios
1.Greens to total
7: 27
2.Blues to total
1:27

1.If the ratio '1:2' changed to '2:2' what would the percent be?
2.What is the percent for '1:27' (Blues to Total)
3.What is the Decimal for '7:5' (Reds to Yellows)

Elona's Ratio BOB's October 20, 2009

HANDY CANDY

http://www.flickr.com/photos/smigol/2645654371/

Part to Part Ratios:
1.Greens to Blue
5:1
2.Yellows to Reds
2:3
3.Blues to Yellows
1:2

Part-To-Total Ratios
1.Greens to total
5: 11
2.Blues to total
1:11

Three-Part Ratios
Blues to Yellows to Greens
1:2:5
Reds:Blue:Yellows
3:5:2

Blues to Yellows- 1:2
Ratio- 1:2
Fraction- 1/2
Decimal- 0.5
Percent- 50%

Equivalent fractions:

2:3
x2-4:6-x2
x3-6:9-x3
x5-10:15-x5

Questions:
1.If the ratio '1:2' changed to '2:2' what would the percent be?
2.What is the percent for '1:11' (Blues to Total)
3.What is the Decimal for '2:3' (Yellows to Reds)





*late*

Elona's Four4's October 29, 2009

Four4's
Question: How is 4/4 the same as 4÷4?

Answer:
4/4 is exactly the same as 4÷4. The symbols "/" and "÷" represent the same thing, which is divide. But "/" is most likely used when dealing with fractions. But the proper way to represent it is using "÷" because some people can mistake "/" for a fraction.

Elona's BOB for October 29, 2009

MISTAKES

My first mistake is not showing my work.
My second mistake is not understanding the questions properly.
My third mistake is little studying.

QUESTIONS THAT WERE DIFFICULT FOR ME

In a group of 84 students surveyed, the ratio of student preference is 7 oatmeal eaters to 4 granola eaters to 3 toasted O eaters. Of the 84 students, how many prefer oatmeal and how many preferred granola?

Use the data in the table below to determine which sports teams have equivalent scored by to scored against ratios.

Team. Scored By Scored Against
Baseball Team A 10 8
Basketball Team A 115 92
Hocley Team A 6 4

WHAT TO DO IN THE FUTURE TEST
Study.
Show my work
Study.

BOB2
A normal deck of playing cards has 52 cards in four suits. (clubs, diamonds, hearts and spades.) of 13 cards each. Two of the suits are black, and two of the suits are red. The ratio of the red cards to the whole deck are:

R/TOTAL = 26/52
R/T = 2/4
answer: 1/2.





*late*

charis' four4's - october 29, 2009

Question : Explain how 4/4 is the same as 4÷4 .

Answer : The symbols "/" and "÷" both mean the same thing. The symbol "/" is most used with fractions. Division is a big part in fractions so i guess its why its okay to use "/" when dividing numbers. The other symbol "÷" is just the more common and it means the same thing as the other symbol.

SORRY ITS LATE !

Charis' BOB 2 ratio for october 29 , 2009

MISTAKES

- my first mistake is not reading the questions carefully.
- my second mistake is not showing my work .
- my third mistake is not studying that much that's why i got a low mark.

QUESTIONS THAT WAS DIFFICULT FOR ME

Team Scored by Scored Against

Baseball Team A 20 16
Basketball Team A 230 184
Hockey Team A 12 8

In a group of 84 students surveyed, the ratio of student preference is 7 oatmeal eaters to 4 granola eaters to 3 toasted O eaters. Of the 84 students, how many prefer oatmeal and how many preferred granola?

WHAT TO DO IN THE FUTURE TEST
- study more and harder
- show work
- read the questions carefully


SORRY ITS LATE !

Vanessa's BOB 2 on ratios

Heeey sorry about my late post for BOB2 on ratios but here it is ....

What were some mistakes you did on your tests ?
A mistake that I did on my tests is that i didn't simplify it ( lowest terms ). Another mistake I did on my tests is not showing enough work, so I got less than what i should have gotten.
What I can do to improve my future tests...
I can study hard and read the questions slowly.

Questions...

1) A picture frame has a width to length ratio of 5:7 . If the width of the photo is 9cm, the length of the photo is ?

a) 11cm b) 12.6cm c) 14cm d) 16cm

The other question is just simplifying the ratio.

http://www.flickr.com/photos/laffy4k/404313786/sizes/o/



PART TO PART RATIO

green to blue
3:3

pink to purple
2:1

gold to silver
1:1

PART TO WHOLE

purple to total
1:12

pink to total
2:12

blue to total
3:12

PART TO PART TO PART

green to purple to pink
3:1:2

blue to silver to gold
3:1:1

purple to blue to green
1:3:3

The ratio I chose was purple to pink

ratio notation

purple:pink

1:2

fraction
purple/pink
1/2 you don't need to simplify

decimal
0.5

percent

50%

MY QUESTIONS...

What is the ratio for purple to green to total?
What can you do to make the fraction larger than it is right now?
What is equal to the fraction 1/2?

That's my BOB 2... again I apologize for this being late. Comment lots and hope you like my post.

Hello!

Hello everybody!

This is Kim, your student mentor! Hope you all are having a great week!

I'm just wondering, what can I do to help you in this class? Do you have any ideas?

The site you guys have here looks pretty cool. I think math would have been easier for me in grade 8 if I had a cool website like this to keep notes organized. Do you guys like having class like this too?

Do you have any questions for me? I was thinking that I better make an effort to make myself known as me, instead of the crazy person who posts pirate videos.

Speaking of which, here is another one. Tell me what you think.

Kathleen's BOB

- 3 things I now know about graphing :

A (BAR) GRAPH needs to have the following :

• a title
  
• x and y axis
• scale * intervals must be same amount going up *
  
• labels for both axis
• colours are optional .

- advantages for different graphs :

Bar Graphs - are best for comparing data.

Circle Graph - are best for comparing categories when using percents.

Pictograph - are best for comparing categories that can easily be counted using symbols.

Line Graph - are best for showing changes of data over time.

Double Bar Graph - are best for comparing two sets of data.


- misrepresenting the data :

• Distorting a bar graph - making other bars looks different form the others makes you focus on that bar .
• Colours - if you change a colour of a bar , it makes the other bars looks like it is not important.
• Breaks - shorten the y-axis' appearance

*sorry if it's very late*

Kathleen's BOB2 Ratio for October 25,2009

MISTAKES.
1. What were the mistakes you made on your test. Show examples of answers that were wrong. What was your mistake. How will you remember what to do in future tests.

• First mistake - I didn't simplify the number in the lowest terms .
• Second mistake - I didn't show all my work .

WHAT TO DO IN THE FUTURE TEST

- study hard . - read and answer the question carefully.


QUESTIONS

1) A picture frame has a width to length ratio of 5:7 . If the width of the photo is 9cm, the length of the photo is ?
a) 11cm b) 12.6cm c) 14cm d) 16cm


2) Use the data below to determine which sports teams have equivalent scored by to scored ratios.

Team Scored by Scored Against

Baseball Team A 20 16
Basketball Team A 230 184
Hockey Team A 12 8

Jeric's BOB2 ratio

1. What were the mistakes you made on your test. Show examples of answers that were wrong. What was your mistake. How will you remember what to do in future tests.

Well the first mistake I did was not putting the questions in there lowest terms.

The second mistake I did was on the percent with the food.

The third mistake I made was not showing my work on the last question.

I will remember what to do in the future tests by reading the question and taking some time to understand it so I could get the correct answer.

2. Rewrite 2 questions that gave you difficulty with different numbers.

Team Scored By Scored Against
Baseball Team A 20 16
Basketball Team A 230 184
Hockey Team A 12 8

A picture frame has a width to length ratio of 10:14. If the width is 18 cm, the length of the photo is
A. 22 cm B. 25.2 cm C. 28 cm D. 32 cm

Michelle's BOB2 Ratio for October 25, 2009

1. Some of the mistakes I made on my test:

On one of the questions I wasn't sure if I should answer it in lowest terms. It didn't say to, so I just put 2:4. Next time I will remember, that the best answer is in lowest terms if there is a choice for it.

The question with 84 students, and finding out the percent, I got mixed up there. I didn't know how to get the percent. But some how on the calculator I ended up pressing numbers to find out the "percent." Since it said to round to one decimal place, I thought I had gotten the right number because I could round18. 4444 etc ( or something like that.) I know now that when you want to find the percent you can just compare the fractions, then divide the fraction to get the decimal.

Also in another question where you had to compare which two teams had the same amount of wins and lost, I didn't show my work because it didn't say to, or I forgot that the teacher said showing your work will give you the marks. I just put 5:4 and a sentence saying they were equivalent to each other. For the next text, I will try to show my work so I can earn those marks.


The questions that gave me difficulty were :

In a group of 84 students surveyed, the ratio of student preference is 7 oatmeal eaters to 4 granola eaters to 3 toasted O eaters. Of the 84 students, how many prefer oatmeal and how many preferred granola?
I got this question right, but in order for you to answer the question, you had to find what number THAT will get you to 84 if you times THAT number by all the " different eaters." Then add it up, and it should give you 84.

A stable has 39 passengers on it as it starts its run. At the first stop 12 passengers get off and 18 passengers get on. What is the ratio of the number of passengers who were on the train when it left the first station? Express your answer in lowest terms.
a) 2:3 b) 13:15 c) 18:12 d) 27:39
This question was hard for me, because the way they put the question got me very confused. I had to read it over and over until I finally found an answer that was on one of the choices. ( I got it right. ) I had to add and subtract numbers, then eventually I had divide to find the lowest terms.

Brain Teasers!

Hey guys,
I was looking on the internet for something cool for you guys to try out! I found some brain teasers so if you're interested in trying them out, click here! Some of them are confusing but I hope you like them! Let me know!
Shelby Mackey

Bob Riemer Ratio

http://www.flickr.com/photos/laffy4k/404313786/sizes/o/

Green to Pink
3:2
Blue to Purple
3:1
Silver to Orange
1:1
Here are my 2 part to whole ratios:
Gold to Total
1:12
Green to Total
3:12
My two 3 part ratios
Blue to Purple to Gold
3:1:1
Green to Silver to Pink
3:1:2
The ratio I have chosen to represent is the Silver to Orange ratio-
Ratio Notation -
Silver to Orange
1:1
Fraction -
1/1
Decimal -
1.00
Percent -
100%

Equivalent fractions are just equal fractions. So to make an equivalent fractions, whatever you do to one side, you just have to do to the other side.

For example, this picture shows the number of green Dots, to the number of total Dots. So to get an equivalent fraction, i just multiplied both the green and total by 2. You may also divide the two different numbers if you like. 

Here are 3 questions you guys could answer:

What is the ratio for mixed colored crayons to total crayons?

What would the percent be, for blue crayons to green crayons?

What would the decimal be, for pink crayons to total crayons?

-riemermunoz

Devin's Bob Ratio October.20/2009

http://www.flickr.com/photos/27147/3411775886/sizes/l/


Part To Part Ratios:





Yellow To Pink
Yellow : Pink
4 : 4




Blue To Green
Blue : Green
2 : 1




White To Black
White : Black
2 : 1




Part To Whole:




Yellow to Total
Yellow : Total
4 : 43




Blue To Total
Blue : Total
2: 43




2 Part To Part Ratios:

Blue To Green To Yellow
Blue : Green : Yellow
2 : 1 : 4


White To Pink To Black
White : Pink : Black
6 : 4 : 2





The Ratio I choose is black to white:




Black : White
2 : 6




Fraction: 2/6




Decimal: 0.3 repeating




Percent: 33.33%




Questions:




1. How do youturn the decimal into a percent?




2.Can you simplify yellow to pink?




3.How do you turn the fraction into a decimal?

Shania's BOB Ratio for October 20, 2009

Part-To-Part

Yellow:Red
4:16

Purple:Green
4:6

Blue:Orange
2:4

Part-To-Part-To-Part
Blue:Purple:Red
1:4:16

Orange:Yellow:Red

2:4:16

Orange:Green:Red

2:6:16

Part-To-Whole
Yellow:Total
4:36

Orange:Total
2:36

The Ratio I choose is blue to orange:

Word ratio - Blue:Orange
Ratio notation - 2:4

Fraction - 2/4

Decimal - o.5

Percent - 50%

Equivalent fraction -

My three questions :
1. Why is word ratio important here ?

2. How do you simplify red to total ?
3. What would the ratio, fraction, decimal and percent be for green to orange?

Jim's bob ratio for october 20. 2009

Part to Part ratio:

Y:R

6:10

G:B
6:2

O:B
4:2

Part to Whole:

Red to total

R:total
10:24

Blue to total
B:total
1:24

Yellow to total

Y:total

6:24







Part to Part to Part

Yellow to red to green
Y:R:G
6:10:6

Red:Blue:Orange
R:B:O
6:2:4

QUESTIONS:

1. WHAT IS THE RATIO FOR...ORANGE,GREEN ,YELLOW??

2.How do you get a percentage for a decimal?

3.How do you get a decimal to a percentage?






http://farm4.static.flickr.com/3022/2645654371_37387b1207.jpg

Princess' Ratio BOB for October 20, 2009

http://www.flickr.com/photos/laffy4k/404313786/sizes/o/

Part to Part Ratio :

1. purple to green

purple : green

1 : 3

2. gold to silver

gold : silver

1 : 1

3. pink to blue

pink : blue

2 : 3

Part to Whole :

1. blue to total

blue : total

3 : 12

2. pink to total

pink : total

2 : 12

Part to Part to Part :

1. gold to green to silver

glod : green : silver

1 : 3 : 1

2. blue to pink to orange

blue : pink : orange

3 : 2 : 1

The ration I chose was pink to blue .

Ratio Notation :

pink : blue

2 : 3

Fraction :

pink/blue

2/3 = 4/6. You multiply the numerator and the denominator by 2 and you get 4/6.

Decimal :

0.66

Percent :

66.66 %

My 3 Questions :

What is the ratio for blue to pink to total ?

What could the fraction 1/2 represent in this picture ?

What could the ratio 2 : 1 represent ?

Part 2:

3. A normal deck of playing cards has 52 cards in four suits (clubs, diamonds, hearts, spades) of 13 cards each. Two of the suits are black and two of the suits are red. The ratio of red cards to the whole deck is ...

mistake : 2:4

right answer : 1:2

5. Erci is able to stop 85 % of the shots on goal. If he faces 27 shots on goal, how many goals would likely be scored on him ?

mistake : 15

right answer : 4

In a group of 84 students surveyed, the ratio of student preference is seven oatmeal eaters to four granola eaters to three toasted 0 eaters.

14. What percent (to one decimalplace) of the group prefers toasted 0's ?

mistake : 18.7 %

right answer : 21.1 %

16. You have a bag with one white ball, six red balls, eight green balls, and three purple balls. In lowest terms, what is the ratio of red balls to the whole bag of balls ?

mistake : 6/8 = 1/3

right answer : 6/8 = 1/3 red balls : whole bag of balls

In the future I should read the questions clearly so that I'll see that I need the answers to be in lowest terms.

Next time I should pay attention to my ratio table so that I won't make any mistakes on my answers.

Next time when I'm trying to find a percent i should double check my ratio table to see if its correct.

2 Questions :

Alex is able to stop 65 % of the shots on goal. If he faces 36 shots on goal, how many goals would likely be scored on him ?

In a group of 75 students surveyed, the ratio of student preference is five oatmeal eaters to eight granola eaters to two toasted 0 eaters.

What percent (to one decimal place) of the group prefers toasted 0's ?

Jose's BOB.Ratio for October 20, 2009

http://www.flickr.com/photos/dmal/29775480134/


Part to part:

Peach to Orange - 1 : 2

Green to Light green - 1 : 1


White to Blue - 1 : 4



Part to WHOLE:

Yellow to total - 2 : 22


Blue to total - 4 - 22



Part to part to part :

Orange to blue to pink - 2 : 4 : 2


Peach to black to white - 1 : 1 : 1



WRITING THE RATIO IN 4 DIFFERENT WAYS : ( fraction, percent, decimal ratio notation )

The ratio I chose is 1 : 2


FRACTION :

The way you write it in a fraction is that you just put the 1 on the numerator and the 2 on the denominator.

DECIMAL :

All you have to do is divide 1 to 2. So all the line means is to divide the numerator from the denominator. 1 / 2 = 0.5



PERCENTAGE :

To find the percentage you just need to use the decimal form. In this case, the decimal is 0.5. In other words that is 50 so there is your answer. 50 %

RATIO NOTATION :

All ratio notation means is the colon in the ratio. 1 : 2 . The colon between the 1 and 2 is ratio notation.


EQUIVILANT RATIOS :

I will choose the ratio 2 : 22 for this question.


Equivilant ratios for 2 : 22 :

- 1 : 11 ( ÷ 2 )
- 4 : 44 ( x 2 )
- 8 : 88 ( x 4 )

Thats how you simplify 2 : 22 in diffrent ways.


MY QUESTIONS :

1. Why do we use ratios? Explain

2. What is the part to part to part ratio for pink to orange to black ?

3. How do ratios help us in real life?


aZn2pRo

John's ratio BOB

hhtp://www.flickr.com.com/photos/laffy4k/404313786/o/

Green:3

Pink:2

Blue:3

Purple:1

Silver:1

Gold:1

Orange:1

Total:12


These are my 3 part to part ratios:

Gold to Orange:

1:1

Blue to Green:

3:3

Pink to Silver:

2:1

These are my 2 part to whole ratios:

Green to Total:

3:12

Pink to Total:

2:12


These are my 2 three part ratios:

Silver to Purple to Gold:

1:1:1

Green to Pink to Orange:

3:2:1


The ratio I picked is the Blue to Green:

3:3

Percent-

300%

Fraction-

3/3

Decimal-

3.00

How to make an equivalent fraction:


What ever you do to the left you do to the right.



Problems:


What is the percent for Gold crayons to Silver crayons:

What is the Decimal for Green crayons to the total crayons:

What is the fraction for Blue crayons to Orange crayons:


-John!

Giuseppe's BOB ratio

Part to part ratios:

Green : Orange

3 : 1

Silver : Blue

1 : 3

Purple : Gold

1 : 1

Part to whole ratios:

Blue : Total

3 : 12

Purple : Total

1 : 12

3 Part ratios:

Green : Silver : Gold

3 : 1 : 1

Write ratio in, ratio notation, fraction, decimal, and percent.

Silver : Blue

Ratio Notation- 1 : 3

Fraction- 1/3

Decimal- 0.33 : 1

Percent- 33%

How to make equivalent ratios

Equivalent ratios are the same as fractions written sideways. It's written differently but means the same thing. For example, 2 : 4 is the same as 2 : 4. Whatever you do on one side, you do it on the other side.

Questions

1. True or False. A part to part ratio compares one part of a group to the whole group.

2. simplify 148 : 111.

3. If there are 3 stars and 1 moon. What should I write if I'm comparing moon to stars?Explain why.