Final answer:
To find out how much milk Kevin drinks in 7 days in milliliters, you would multiply 0.55 liters by 1000. Therefore, Kevin drinks 550 milliliters of milk in 7 days.
Step-by-step explanation:
To convert liters to milliliters, you need to multiply the number of liters by 1000. In this case, Kevin drinks 0.55 liters of milk everyday, so to find out how much milk he drinks in 7 days in milliliters, you would multiply 0.55 by 1000. 0.55L * 1000 = 550 mL Therefore, Kevin drinks 550 milliliters of milk in 7 days.