## Sunday, November 1, 2009

### Ronny's Rate Growing Post

Define Ratio: An expression that compares quantities relative to each other.

Define Rate: Compares 2 quantities/amounts in different units.

The difference between rate and ratio is that ratio compares 2 units of the same group/measurement while rate compares 2 units of DIFFERENT measurements.

The answer to question 5 on page 60.

A) A blue whale eats 8 t of krill in 2 days.

To get the answer you will have to simplify it to unit rate meaning that the second number "2" should be turned into a 1.

So 2 ÷ 2 is 1 and since you have to do the same to the other side, 8 ÷ 2 is 4. As a unit rate, it would be 4t(t=tons)/(/=per) d (d= day).

So without all the annoying stuff in between, it is simply "4t/d". :D

B) The cruising speed of a blue whale allows it to travel 193 km in 10 h.

To get the answer, you will once again have to simplify it for unit rate, meaning that the second number, "10" should be turned into a 1.

So 10 ÷ 10 is 1 and since you have to do the same to the other side, 193 ÷ 10 is 19.3. As a unit rate, it would be 19.3km(km=kilometers)/(/=per) h (h= hour).

So without all the annoying stuff in between, it is simply "19.3km/h". :3

C)A bull moose bellows 15 times in 2½ h.

To get the answer, you will once again have to simplify it for unit rate, meaning that the second number, "2½" should be turned into a 1.

So 2½ ÷ is 1 and since you have to do the same to the other side, 15 ÷ is 6. As a unit rate, it would be 6b(b=bellows)/(/=per) h (h= hour).

So without all the annoying stuff in between, it is simply "6b/h". :p

The answer to question 14 on page 61.

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

To get the answer you must find the rate of Canadians for euros.

\$1 = \$0.6940

Simply multiply \$0.6940 by 600.

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

To get the answer you must find the rate of Canadians for U.S. dollars.

\$1 = \$0.8857.

Simply multiply \$0.8857 by 375.

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

To get the answer you must find the rate of Canadians for Australian dollars.

1\$ = 1.1527

Simply multiply \$1.1527 by 450.

Part Duo (Its two)

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.

1 lb = 16 oz
1 tsp = 4.929 ml

40
--- oz ground beef
80
2.5 medium sized onions
2.5 celery finely sliced
2.5 cloves of garlic
35 oz can of tomatoes chopped
2
--- can of tomato paste
5
12.32 ml parsley
7.393 ml basil
4.929 ml oregano
4.929 ml sugar
7.393 ml Worchestershite Sauce
7.393 ml Seasoning salt
2.5 Bay Leaf

I just multiplied everything by 2.5. I also could have divided everything by 4 then multiply it by 10.

2) What would the recipe look like if you had to only serve 1 person? Show your calculations.
4
--- oz ground beef
8
0.25 medium sized onions
0.25 celery finely sliced
0.25 cloves of garlic
35 oz can of tomatoes chopped
0.2
--- can of tomato paste
0.5
1.232 ml parsley
0.7393 ml basil
0.4929 ml oregano
0.4929 ml sugar
0.7393 ml Worchestershite Sauce
0.7393 ml Seasoning salt
0.25 Bay Leaf

Just divide the answers from question one by 10 and you get your answer for one person eating spaghetti...........

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