# What city has the highest gasoline price?

Skills: Decimals (Subtraction) (number comparison)

Related environmental issues:  Energy

The table below shows the average price of gasoline per gallon in five big cities the United States in March 2018.

1. Among the five cities, which city had the highest gasoline price?
2. Among the five cities, which city had the lowest gasoline price?
3. What is the difference between the highest price and the lowest price?
4. Which city had the price 6 cents lower than the price in Chicago?
5. Which is bigger, the difference between New York City and Los Angeles or the difference between Houston and San Fransisco?

Sources: U.S. Energy Information Administration (2018) Retail Gasoline and Diesel Prices

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1. Los Angeles
2. Houston
3. \$1.16 (3.56 – 2.4 = 1.16)
4. New York City
5. Houston and San Fransisco (Los Angeles – New York: 3.56 – 2.73 = 0.83)  (San Fransisco – Houston: 3.53 – 2.4 = 1.13)

# How does your plastic use affect marine life?

Skills: Multiplication and Division

Related environmental issues: Plastic Waste

A whale was found dead on the Murcian coast in southern Spain in late February after swallowing 64 pounds of plastic waste.

Dead Whale Project of Greenpeace Philippines

Most plastic grocery bags are thrown away after being used, and millions of tons of plastic bags end up in the ocean. Those plastic bags have killed marine birds and turtles that confused plastic bags for jellyfish and plankton. The amount of plastic waste found in the ocean in a year is equivalent to five plastic grocery bags for every foot of coastline in the world.

1. How many grocery bags are found in 1 mile of coastline in a year? (1mile = 5,280 feet)
2. How many grocery bags are found in 1 mile of coastline in a month?
3. Every month, 25 volunteers gather at their 1-mile beach to pick up plastic waste.  How many grocery bags does each volunteer need to pick up to clean their beach?
4. 4.It is reported that the amount of plastic waste will double by 2025. How many grocery bags will be found in 1 mile of coastline in a year of 2025?

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