A nurse is preparing to administer buprenorphine 4 mcg/kg IV bolus to a child who weighs 74 lb. Available is buprenorphine injection 0.3 mg/mL. How many mL should the nurse administer? (Round the answer to the nearest hundredth. Use a leading zero if it applies. Do not use a trailing zero.)

Calculating the total dose in mg: Convert the child's weight to kg: 74 lb ÷ 2.2 lb/kg = 33.64 kg Calculate the total dose: 33.64 kg × 4 mcg/kg = 134.56 mcg Converting mcg to mg: 1 mg = 1000 mcg 134.56 mcg ÷ 1000 mcg/mg = 0.13456 mg Calculating the volume to administer: Use the concentration of the medication: 0.13456 mg ÷ 0.3 mg/mL = 0.45 mL