Explanation:
To know what is the cost to travel 380 miles, we need to know the cost of one gallon of fuel. So, let's assume that this cost is $3.8 per gallon.
Since 380 miles spent 20 gallons of fuel, the cost is
C = 20 gallons x $3.8 = $76
Answers:
Therefore, the answers are:
How much would that cost: $76
What did you have to assume to get the answer: The cost of one gallon of fuel
Type the number you assumed here: 3.8
