## Monday, November 2, 2009

### Justin's %%%%%'s Rate Growing Post

Part 1

Definitions ;
Ratio - compares 2 quantities measured in the same units
Rate - compares 2 quantities measured in different units.

What is the difference between ratio and rate?

Ratio compares 2 quantities measured in the same units where rate compares 2 quantities measured in different units.

PAGE 60

4. Determine the unit rate in each situation

1 - An orca swims 110 km in 2 h.
- 110 divided by 2 = 55 , 55= 1 hour . 55 km in 1 h

2 - A Canada goose flies 800 km in 12.5 h.

- 800 divided by 12.5 = 64 , 64 km per hour

c)Cathy plants 45 daffodils in 30 min.

- 30 x 2 = 60 min ( 1 hour) , 45 x 2 = 90 , 90 daffodils in 1 hour.

PAGE 61

Trever rode his mountain bike 84 km in 3h. Jillian rode 70 km in 2.5 h. Who is the faster cyclist? How do you know?

- 84 divided by 3 = 28
70 divided by 2.5 = 28

Trevor and Jillian both rode at the same speed, 28km per hour.

Part 2

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

We have to show what the recipe would look like if we fed 10 people, and also if we served only 1.

To find the recipe for 10 people is very simple, all you have to do is multiply everything by 2.5.

INGREDIENTS FOR SPAGHETTI SAUCE ( 10 PEOPLE)

1 1/4 lb ground beef
2.5 medium onion ( diced)
2.5 celery ( finely diced)
2.5 clove garlic
35 oz can of tomatoes ( chopped)
1 1/4 can of tomato paste
2.5 tsp parsley
3 3/4 tsp basil
2.5 tsp oregano
2.5 tsp sugar
1 1/4 tsp Worcestershire sauce
1 1/4 tsp seasoning salt
2.5 bay leaf

INGREDIENTS FOR SPAGHETTI SAUCE ( 1 Person)

To find the recipe for 1 person we have to divide each ingredient by 4.

0.125 lb ground beef
1/4 medium onion ( diced)
1/4 celery ( finely diced)
1/4 clove garlic
3.5 oz can of tomatoes ( chopped)
0.125 can of tomato paste
1/4 tsp parsley
0.375 tsp basil
1/4 tsp oregano
1/4 tsp sugar
0.125 tsp Worcestershire sauce
0.125 tsp seasoning salt
1/4 bay leaf

1. good job you explained it really well but it would be better if you show us how you got ur answers for the ingredients questions..

2. good job ! I liked how you explained your thinking really well .