Final Answer:
The unit rate is $1.02 per liter.
Step-by-step explanation:
To find the unit rate, divide the total cost by the quantity. In this case, $8.19 divided by 8 liters equals $1.02375 per liter. Rounding to the nearest hundredth, the unit rate is $1.02 per liter. This means that for every liter of the liquid, the cost is approximately $1.02. Unit rates provide a standard for comparing prices and are especially useful when dealing with different quantities.
In this context, it simplifies the cost to a per-liter basis, allowing for easy comparison with other similar products or quantities. The rounding to the nearest hundredth ensures that the unit rate is expressed in a practical and standard currency format, making it more user-friendly for practical applications and comparisons. Overall, calculating unit rates is a fundamental skill in various real-life scenarios, aiding in informed decision-making based on cost efficiency and value comparisons.