Final answer:
The flow rate of the 500 ml bolus of ns over 2.5 hours is 3.33 ml/hr.
Step-by-step explanation:
The flow rate can be calculated by dividing the volume by the time. In this case, the volume is 500 ml and the time is 2.5 hours. However, we need to convert the time to minutes to be consistent with the flow rate units. There are 60 minutes in an hour, so 2.5 hours is equal to 150 minutes.
Using the formula Q = V/t, the flow rate (Q) is equal to 500 ml divided by 150 minutes, which simplifies to 3.33 ml/hr.