If the 1 liter infused at 91 mL/h has progressed for 5 hours, how many milliliters have been delivered?

If the 1 liter infused at 91 mL/h has progressed for 5 hours, how many milliliters have been delivered?

• A. 375 mL
• B. 455 mL
• C. 505 mL
• D. 580 mL

Answer: (B)

The main idea is to use rate × time to find how much has been delivered. With an infusion rate of 91 mL per hour for 5 hours, the volume delivered is 91 × 5 = 455 mL. A 1-liter bag equals 1000 mL, so after 5 hours you’ve infused 455 mL and have 545 mL remaining. The correct amount delivered is 455 mL.

The main idea is to use rate × time to find how much has been delivered. With an infusion rate of 91 mL per hour for 5 hours, the volume delivered is 91 × 5 = 455 mL. A 1-liter bag equals 1000 mL, so after 5 hours you’ve infused 455 mL and have 545 mL remaining. The correct amount delivered is 455 mL.