Morphine has a half-life of 2.5 hours. A patient takes two

Last updated: 7/4/2022

Morphine has a half-life of 2.5 hours. A patient takes two 15mg tablets of morphine before work in the morning. She takes another 15mg tablet during her lunch break 4 hours later. 5 hours after her lunch break, she arrives back home. How much morphine is in the patient's system just before she takes the extra pill during her lunch break? How much morphine is in her system when she gets home?