Answer:
5.8 L
Step-by-step explanation:
To add milliliters to liters, you'd need to either convert the milliliters to liters or the liters to milliliters.
If you were to convert the milliliters to liters, you can divide 2300 by 1000 because "milli" means 1/1000. This gives you 2.3 L.
You can then add 2.3 L to 3.5 L to give you 5.8 L total.