The answer is: The correct dose of medication to give is 5.6 mL
To solve this problem we need to establish a relationship between the prescripted medication and the available solution.
Let's write the needed equations to establish the relantionship:
[tex]\frac{125mg}{5mL}=1\\\\125mg=5mL[/tex]
The available solution means 125 mg each 5 mL of solution, so:
[tex]\frac{125mg}{5mL}=\frac{140mg}{x}\\\\x*\frac{125mg}{5mL}=140mg\\\\x=140mg*\frac{5ml}{125mg}=\frac{700mg*mL}{125mg}=5.6mL[/tex]
Hence, the correct dose of medication to give is 5.6 mL of the 125 mg/5mL solution.
Have a nice day!