If the state was able to make transportation methods 20% more efficient, then based on the cost of transportation, they would save $2.84 billion.
How much would the city save?
First, find the current cost of transportation:
= Transportation usage x Cost of transportation
= 7.10 x 10¹⁴ x 20 / 10⁶
= $14.2 billion
If methods became 20% more efficient then 20% of savings will be made:
= 14.2 x 20%
= $2.84 billion
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