Final answer:
The I.V. will run for 2 hours and 0 minutes longer.
Step-by-step explanation:
To determine how much longer the I.V. will run, you need to know the total running time of the I.V. and the current elapsed time. Let's assume the I.V. runs for 4 hours in total. If the I.V. has been running for 2 hours already, then it will run for another 2 hours.
Therefore, the I.V. will run for 2 hours and 0 minutes longer.