Answer:
9 mL.
Step-by-step explanation:
Dosage of insulin is 90 mg
The concentration of insulin is 10 mg/mL
We need to find how many milliliters of the solution do you need to give the patient. It can be calculated as follows :
![x=\frac{90\ \text{mg}}{10\frac{\text{mg}}{\text{mL}}}\\\\x=(9)/(1)\ \text{mL}](https://img.qammunity.org/2021/formulas/chemistry/college/kmrssitpbrgtvoh14bxwr0bt1fzlne829w.png)
So, 9 mL of the solution is to be given to the patient.