Solution:
Question 1:
80mg was prescribed to the patient.
The dose for the injection is 50mg/2mL
This means for every 2mL, 50mg is prescribed.
[tex]\begin{gathered} 2mL=50mg \\ 50mg=2mL \\ 1mg=\frac{2}{50}mL \\ 1mg=\frac{1}{25}mL \end{gathered}[/tex]Hence, the volume required for 80mg will be;
[tex]\begin{gathered} 1mg=\frac{1}{25}mL \\ 80mg=\frac{1}{25}\times80mL \\ 80mg=3.2mL \\ =3.20mL\text{ to 2 decimal places} \end{gathered}[/tex]Therefore, the volume required for the prescribed 80mg will be 3.20mL
Question 2:
48mL of urine sample was measured into a 4-ounce beaker.
[tex]1oz=29.57mL[/tex]Hence, the 4-ounce beaker will have a full volume of;
[tex]\begin{gathered} 1oz=29.57mL \\ 4oz=29.57\times4mL \\ 4oz=118.28mL \end{gathered}[/tex]The beaker has a volume of 118.28mL
Since 48mL has been poured into the beaker, the added volume of urine that is needed to fill the beaker up will be;
[tex]\begin{gathered} =118.28-48 \\ =70.28mL \end{gathered}[/tex]Therefore, 70.28mL more of urine sample is needed to fill up the beaker.