Final answer:
Ann should plan to buy approximately 175 liters of gas for her 2,100 kilometer trip. Given the average price of $1.49 per liter, she should expect to spend about $260.75 on gas.
Step-by-step explanation:
To find out how many liters of gas Ann should plan to buy for her 2,100 kilometer trip, we need to use the car's fuel efficiency. Ann's car gets about 12 kilometers per liter of gas. The following steps will allow us to calculate the required amount of gas and the total cost:
- Divide the total distance of the trip by the fuel efficiency to find the amount of gas needed:
2100 km ÷ 12 km/L = 175 L - Round the result to the nearest liter, which will remain 175 liters since it is already an integer.
- To calculate the total cost, multiply the number of liters needed by the average price per liter:
175 L × $1.49/L = $260.75
Therefore, Ann should plan to buy approximately 175 liters of gas, and she should expect to spend about $260.75 for gas.