Define appropriate quantities for the purpose of descriptive modeling.
Example Problems
Last Sunday, an accident caused a traffic jam long on a straight stretch of a freeway.
How many vehicles do you think were in the traffic jam?
Explain your thinking and show all calculations.
How many vehicles do you think were in the traffic jam?
Explain your thinking and show all calculations.
Sadie has a cousin, Nanette, in Germany. Both families recently bought new cars, and the two girls are comparing how fuel-efficient the two cars are. Sadie tells Nanette that her family's car is getting . Nanette has no idea how that compares to her family's car because in Germany mileage is measured differently. She tells Sadie that her family's car uses .
Which car is more fuel-efficient?
Which car is more fuel-efficient?
The price of copper fluctuates. Between 2002 and 2011, there were times when its price was lower than per pound and other times when its price was higher than per pound. Copper pennies minted between 1962 and 1982 are copper and zinc by weight, and each penny weighs grams.
At what price per pound of copper does such a penny contain exactly worth of copper?
(There are grams in one pound.)
At what price per pound of copper does such a penny contain exactly worth of copper?
(There are grams in one pound.)
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