Answer :
To administer a 150mg dose of Robitussin, which is 100mg per 5mL, the patient needs to take 1.5 teaspoons, as 7.5mL is required for the dose and 1 teaspoon equals 5mL. the correct answer is option d)1.5 teaspoons
To calculate the number of teaspoons of Robitussin the patient needs to take, we need to use the concentration information provided and convert it to the required dose. The label on the Robitussin bottle reads 100mg per 5mL. We need to give a dose of 150mg. First, determine how many milliliters are needed for the 150mg dose:
100mg is to 5mL as 150mg is to X mL
Using cross-multiplication:
100mg x X mL = 150mg x 5mL,
X = (150mg x 5mL) / 100mg,
X = 750mg*mL / 100mg,
X = 7.5 mL.
Since 1 teaspoon is approximately 5mL, we divide 7.5mL by 5mL per teaspoon to find the number of teaspoons:
7.5 mL / 5 mL/teaspoon = 1.5 teaspoons.
Therefore, the patient will need to take 1.5 teaspoons of Robitussin. the correct answer is option d)1.5 teaspoons
