Final answer:
To convert 0.5 liters to milliliters, multiply by 1,000 because there are 1,000 milliliters in 1 liter. Therefore, the medicine bottle will be filled with 500 mL.
Step-by-step explanation:
To convert liters to milliliters, you need to multiply by 1,000 because there are 1,000 milliliters in 1 liter. In this case, the doctor has prescribed 0.5 liters of liquid medicine, so you multiply 0.5 by 1,000 to get the answer. Therefore, the medicine bottle will be filled with 500 mL.