Final answer:
To find out how much more gas can be poured into a 3.5-gallon gas can that already contains 9/10 gallons, subtract the amount of gas already in the can from the total capacity of the can. The answer is approximately 9.854 liters.
Step-by-step explanation:
To find out how much more gas can be poured in, we need to subtract the amount of gas already in the can from the total capacity of the can.
The gas can has a capacity of 3.5 gallons, which is equivalent to 3.5 * 3.79 = 13.265 liters.
They can already contain 9/10 gallons, which is equivalent to 9/10 * 3.79 = 3.411 liters.
To find out how much more gas can be poured in, subtract the amount of gas already in the can from the can's total capacity: 13.265 - 3.411 = 9.854 liters.
Therefore, you can pour in approximately 9.854 liters of gas.