At first, we need to find the Dosage for Ms. Campbell's weight
We will do that using the ratio method
[tex]\begin{gathered} 12mg\rightarrow1kg \\ xmg\rightarrow88.7kg \end{gathered}[/tex]
By using the cross-multiplication
[tex]\begin{gathered} x=\frac{88.7\times12}{1} \\ x=1064.4mg \end{gathered}[/tex]
Now, we will find the number of milliliters of medicine when using the concentration of 250 mg/5 mL
[tex]\begin{gathered} 250mg\rightarrow5mL \\ 1064.4mg\rightarrow ymL \end{gathered}[/tex]
By using the cross-multiplication
[tex]\begin{gathered} y=\frac{1064.4\times5}{250} \\ y=21.288mL \end{gathered}[/tex]
Round it to the nearest 1 decimal place, then
y = 21.3 mL
The answer is 21.3 mL
