The appropriate domain for this scenario would depend on the limitations or constraints of the machine. If there are no limitations on the machine's capacity, then the domain could be all positive real numbers or the set of all non-negative real numbers. However, if there are limitations, such as a maximum capacity or a minimum number of balloons required to operate the machine, then the domain could be restricted accordingly. For example, if the machine can blow up a maximum of 100 balloons per minute, then a suitable domain could be from 0 to 100 inclusive, denoted as [0, 100].
