Final answer:
The total final volume to administer is approximately 100 ml, assuming the volume of Ceftazidime is small compared to the volume of the diluent (0.9% NS).
Step-by-step explanation:
The total final volume to administer when adding and diluting Ceftazidime into 100 ml 0.9% NS would be simply the volume of the normal saline (NS) plus any additional volume of the medication (Ceftazidime). However, as the volume of the medication is not provided in the question, we can only assume that it is negligible compared to the volume of the diluent. Therefore, the total final volume to administer, in this case, is approximately 100 ml, assuming the volume of Ceftazidime added is small. Medical personnel often perform such dilutions and calculations to prepare IV solutions for patients.