Question

Anna used 900 gallons of gasoline last year driving to and from work. This year, she changed jobs. She now uses only 600 gallons of gas annually.
If each gallon of gas releases 20 pounds of CO2 when burned, Anna reduced her CO2 emissions by

Answer 1

Answer:

It's 33.3% NOT 3.33%

Step-by-step explanation:

Answer 2

Using unitary method, Anna reduced $CO_{2}$ emissions by 6,000 pounds.

What is unitary method?

'The unitary method is a technique for solving a problem by first finding the value of a single unit, and then finding the necessary value by multiplying the single unit value.'

According to the given problem,

Volume of gasoline used last year = 900 gallons

Amount of $CO_{2}$ burned = ( 900 × 20 ) pounds

                                      = 18,000 pounds

Volume of gasoline used this year = 600 gallons

Amount of $CO_{2}$ burned = ( 600 × 20 ) pounds

                                       = 12,000 pounds

Amount reduced = ( 18,000 - 12,000 ) pounds

                            = 6,000 pounds

Hence, we can conclude, Anna reduced her $CO_{2}$ emissions by 6,000 pounds.

Learn more about unitary method here

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