SOLUTION
Question 4
Step1: Write out the given information
[tex]\begin{gathered} \text{Quantity prescribe: 6mg} \\ \text{label on the prescription =2mg per 4ml} \end{gathered}[/tex]Step2: Convert the quantity prescribe to ml
[tex]\begin{gathered} 2mg\text{ contains 4ml} \\ 6mg\text{ will contains }\frac{6\times4}{2}=\frac{24}{2}=12ml \end{gathered}[/tex]Step3: Convert 12ml to the number of teaspoons using the conversion formula
[tex]1ml=0.20\text{ teaspoon}[/tex]Hence
[tex]\begin{gathered} \text{if 1ml=0.2teaspoon} \\ \text{then } \\ 12ml\text{ = 12}\times0.2=12\times\frac{2}{10}=\frac{24}{10}=2.4\text{ teaspoon } \end{gathered}[/tex]Therefore the number of teaspoons of cough medicine the patient needs to take is 2.4