Final answer:
To find out how much milk-tea there is in the cup, add the volumes of milk and plain tea. The total volume of milk-tea is 100.95mL.
Step-by-step explanation:
To find out how much milk-tea there is in the cup, we need to add the volumes of milk and plain tea. The volume of milk is 35.5mL and the volume of plain tea is 65.45mL. So the total volume of milk-tea is 35.5mL + 65.45mL = 100.95mL.