A nurse is preparing to administer acetaminophen 10/mg/kg PO to a preschool child for fever. The child weighs 22 lb. Available is acetaminophen liquid 160 mg/5 mL. How many mL should the nurse administer? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)

First, convert the child's weight from pounds to kilograms: 22 lb÷2.2=10 kg Calculate the dose: 10 kg×10 mg/kg=100 mg Next, calculate how many mL of acetaminophen liquid (160 mg/5 mL) is needed for 100 mg: 100mg÷160mg/5ml = 100 × 5/160 = 3.125ml Rounded to the nearest tenth, administer 3.1 mL (since the medication is typically measured in tenths).