a. Mrs. Jones needs 20.4 mg of drug 'X' in the morning.
b. Mrs. Jones receives 61.2 mg of drug 'X' every day.
c. Mrs. Jones needs 428.4 mg of drug 'X' per week.
Step-by-step explanation:
Mrs. Jones weighs 68 kg and requires 300 mcg of drug 'X' per kg of her weight per day. To calculate the amount of drug 'X' she needs in the morning (Part a), we multiply her weight (68 kg) by the required dosage (300 mcg/kg), which results in 20,400 mcg. Since 1 mg is equal to 1,000 mcg, the morning dosage is 20.4 mg.
For Part b, we know Mrs. Jones needs the drug three times a day, so her daily dosage is three times the morning dosage, which is 20.4 mg * 3 = 61.2 mg.
Finally, for Part c, we need to calculate how much drug 'X' Mrs. Jones needs in a week. Since there are seven days in a week, we multiply the daily dosage (61.2 mg) by seven, resulting in 428.4 mg of drug 'X' needed per week.
In summary, Mrs. Jones requires 20.4 mg of drug 'X' in the morning, receives a total of 61.2 mg every day, and needs 428.4 mg in a week. It is important to adhere to the prescribed dosage to ensure her well-being and treatment efficacy.