Answer:
0.6 mL
Step-by-step explanation:
This is a desire over have question, so first you will want to see your units are the same (mg to mg, g to g, etc).
Then after that , you will multiply with with the mL (which is 5) and divide by 25 mg, which is 0.6
3mg * 5mL / 25 mg = 0.6 mL since the mg units cancel out.