So the question is as follows:
"Your mobile HF transceiver draws 22 amperes on transmit. The manufacturer suggester limiting voltage drop to 0.5 volt and the vehicle battery is 3 metres(10 feet) away. Given the losses below at that current, which minimum wire gauge must you use?"
and the options are as follows:
A) Number 8, 0.05 V per metre (0.01 V per foot) B) Number 12, 0.11 V per metre (0.03 V per foot) C) Number 10, 0.07 V per metre (0.02 V per foot) D) Number 14, 0.19 V per metre (0.06 V per foot)
I believe that the answer is option B as it is the highest voltage drop that is below .5 volts for 10 feet of cable. But the answer key states that answer C is correct.