Question

what should you do first when unhooking the jump pack?
remove positive cable
remove negative cable
doesnt matter which cable is removed first
shut the unit off

Explanation:

When unhooking a Jump Pack, safety is key. Removing the negative cable first helps prevent accidental short - circuits. The positive cable is more likely to cause sparks or short - circuits if it comes into contact with metal parts before the negative is disconnected. Shutting the unit off is not the first step in unhooking. And it does matter which cable is removed first for safety reasons.

Answer:

Remove negative cable