Final answer:
The estimated resistance of the human body is approximately 400 kilohms.
Step-by-step explanation:
The resistance of the human body can be estimated by using Ohm's Law, which states that resistance is equal to voltage divided by current. In this case, the student has provided the voltage (1200 V) and average current (3 mA) generated by a stun gun or TASER. By dividing the voltage by the current:
Resistance = 1200 V / 0.003 A = 400,000 ohms (or 400 kilohms)
Therefore, the estimated resistance of the human body is approximately 400 kilohms.