QUESTION IMAGE
Question
a certain drug is used to treat a bacterial infection. a doctor orders \\(300\text{ mg}\\) every \\(6\text{ hrs}\\). how many grams of the drug would be given in \\(1\text{ wk}\\)?
\\(\bigcirc\\) \\(84\text{ g}\\)
\\(\bigcirc\\) \\(12\text{ g}\\)
\\(\bigcirc\\) \\(8.4\text{ g}\\)
\\(\bigcirc\\) \\(1.2\text{ g}\\)
Calculate total doses per week
Using the Dimensional Analysis knowledge point
$$
\text{Doses per week} = 1\text{ wk} \times \frac{7\text{ days}}{1\text{ wk}} \times \frac{24\text{ hrs}}{1\text{ day}} \times \frac{1\text{ dose}}{6\text{ hrs}} = 28\text{ doses}
$$
Convert total mass to grams
Using the Unit Conversion and Dimensional Analysis knowledge points
$$
\text{Total mass} = 28\text{ doses} \times \frac{300\text{ mg}}{1\text{ dose}} \times \frac{1\text{ g}}{1000\text{ mg}} = 8.4\text{ g}
$$
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- (A) 84 g
- (B) 12 g
- (C) 8.4 g (Correct answer)
- (D) 1.2 g