Sure, let's work through this step-by-step:
Step 1: Convert Liters to Milliliters
First, we need to convert 3.9 liters to milliliters. Since 1 liter is equal to 1000 milliliters, we can perform the conversion by multiplying:
3.9 liters × 1000 milliliters/liter = 3900 milliliters
Step 2: Add Milliliters
Next, we add the milliliters obtained from the above conversion to the initial 2500 milliliters:
2500 milliliters + 3900 milliliters = 6400 milliliters
Step 3: Convert Milliliters to Liters (Optional)
To also express the total in liters, we convert 6400 milliliters back to liters. Since 1 liter is equal to 1000 milliliters, we perform the division:
6400 milliliters / 1000 milliliters/liter = 6.4 liters
Final Answer
The total is 6 liters or 6400 milliliters.
So, the answer to the question is:
The total is [tex]\(6\)[/tex] liters or [tex]\(6400\)[/tex] milliliters.