Final answer:
To calculate the amount of the drug that should be given to a 50lb patient, divide the weight in pounds by 2.2 to convert it to kilograms. Then, multiply the weight in kilograms by the recommended dosage of 0.1g/kg, and convert the result to milligrams by multiplying by 1000.
Step-by-step explanation:
To calculate the amount of the drug that should be given to a patient, we need to convert the weight of the patient from pounds to kilograms. Since 1 kg is equal to 2.2 pounds, we divide the weight in pounds by 2.2 to get the weight in kilograms. In this case, the patient weighs 50 pounds, so the weight in kilograms is 50/2.2 = 22.7 kg. The recommended dosage of the drug is 0.1g/kg, so we multiply the weight in kilograms by 0.1 to find the dosage in grams. 22.7 kg * 0.1 = 2.27 g. Since 1 g is equal to 1000 mg, the dosage in milligrams is 2.27 * 1000 = 2270 mg.