## Sunday, November 1, 2009

### Michelle's Rate Growing Post

Part 1

Ratio : compares 2 quantities measured in different units
Rate : compares 2 quantities measured in the same units

What is the difference between ratio and rate?
The differnce is Ratio is in DIFFERENT units and Rate is in the SAME units.

Question from pg. 60 :

5. What is the unit rate in each?

a) A blue whale eats 8 t of krill in 2 days.
answer : 4 t krill / day

b) The cruising speed of a blue whale allows it to travel 193 km in 10 h.
answer : 19.3 km / h

c) A bull moose bellows 15 times in 2 1/2 h.

Question from pg. 61
10. Trevor rode his mountain bike 84 km in 3 h. Jillian rode 70 km in 2.5 h. Who is
the faster cyclist? How do you know?
answer: Both of them were the same speed because they got 28k/h.

Coin question:
If the pennies were stacked how tall would they be ?
( I actually measured the 50 pennies )
71mm : 50pennies
1mm : penny

50/50 = 1
71mm/50 = 1.42mm

( I just rounded 1.42 to 1 because that is really tiny and I don't think you can see that on a ruler.)

Part 2
1) What would the recipe look like if it had to serve 10 people? Show your calculations.

10 ÷ 4 = 2.5

ground beef - 0.5 x 2.5 = 1.25 lb
medium onion, diced - 1 x 2.5 = 2.5
stalk celery finely diced - 1 x 2.5 = 2.5
clove garlic, minced - 1 x 2.5 = 2.5
canned tomatoes, chopped - 14 x 2.5 = 35 oz
can tomato paste - 0.5 x 2.5 = 1.25
parsley - 1 x 2.5 = 2.5 tsp
basil - 1.5 x 2.5 = 3.75 tsp
oregano - 1 x 2.5 = 2.5 tsp
sugar - 1 x 2.5 = 2.5 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 = 2.5

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

10
÷ 1 = 10

ground beef - 1.25 ÷ 10 = 0.125 lb
medium onion, diced - 2.5 ÷ 10 = 0.25
stalk celery finely diced - 2.5 ÷ 10 = 0.25
clove garlic, minced - 2.5 ÷ 10 = 0.25
canned tomatoes, chopped - 35 ÷ 10 = 3.5 oz
can tomato paste - 1.25 ÷ 10 = 0.125
parsley - 2.5 ÷ 10 = 0.25 tsp
basil - 3.75 ÷ 10 = 0.375 tsp
oregano - 2.5 ÷ 10 = 0.25 tsp
sugar - 2.5 ÷ 10 = 0.25 tsp
Worcestershire Sauce - 1.25 ÷ 10 = 0.125 tsp

seasoning salt - 1.25 ÷ 10 = 0.125 tsp
bay leaf - 2.5 ÷ 10 = 0.25