Rate- A quantity measured with respect to another measured quantity.

Difference between ratio and rate- A ratio is the comparison between two numbers with the same unit. For example 3 oranges to two oranges. On the other hand, a rate is an indication of the measurements of different units per unit. For example, the statement 3 oranges/ person shows the relationship between the measurement of oranges per person.

Question from page 60:

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

Answer: The blue whale eats 4 tons of krill each day.

Question from page 61:

Trevor rode his mountain bike 84 km in 3 h. Jillian rode 70 km in 2.5 h. Who is the fastest cyclist?

Answer:They both have the same speed of 28 km.

Coin Rate:

How many pennies would there be in each jar (saying there were 6 jars).

If there were 3000 pennies combined in 6 jars, you would just need to find the unit rate (divide each numbers by 6) and then you would get your answer. So there are 500 pennies/jar.

Part 2:

The recipe for Grade 8 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-0.5x 2.5=1.251b

-medium onion,diced-1x 2.5=2.5

-clove garlic,minced-1x2.5=2.5

-canned tomatoes-1x25=35oz

-tomato paste-0.5 x 2.5=1.25

-parsley-1x2.5=2.5 tsp

-basil-1.5x2.5=3.75 tsp

-oregano-1x2.5=2.5 tsp

-sugar1x2.5=2.5 tsp

-Worcestershire sauce-0.5x2.5 tsp

-salt-0.5x2.5=1.25 tsp

-bay leaf-1x2.5=2.5

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 lb

-medium onion,diced-2.5 ÷ 10 = 0.252.5

-clove garlic,minced-2.5 ÷ 10 = 0.25

-canned tomatoes-2.5 ÷ 10 = 0.2535

-tomato paste-35 ÷ 10 = 3.5 oz

-parsley-1.25 ÷ 10 = 0.125

-basil-2.5 ÷ 10 = 0.25 tsp

-oregano-3.75 ÷ 10 = 0.375 tsp

-sugar-2.5 ÷ 10 = 0.25 tsp

-Worcestershire sauce-1.25 ÷ 10 = 0.125 tsp

-salt-1.25 ÷ 10 = 0.125 tsp

-bay leaf-2.5 ÷ 10 = 0.25

-John!

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