A nurse is preparing to administer lactated Ringer's 100 mL IV over 15 minutes. The nurse should set the IV infusion pump to deliver how many mL/hr? (Round to the nearest whole number.)

Step 1: Convert the infusion time from minutes to hours. 15 minutes ÷ 60 minutes/hour = 0.25 hours Result at step 1 = 0.25 hours Step 2: Calculate the infusion rate in mL/hr. 100 mL ÷ 0.25 hours = 400 mL/hr Result at step 2 = 400 mL/hr Step 3: Round to the nearest whole number. 400 mL/hr is already a whole number. Result at step 3 = 400 mL/hr