Final answer:
To find the remaining amount of wire, subtract the amount used from the total length of the wire.
Step-by-step explanation:
To find out how many meters of wire the electrician has remaining, you need to subtract the amount of wire used from the total length of the wire. If the electrician used 14.742 meters of wire and initially had a total length of wire, you would subtract 14.742 from the total length to find the remaining amount. The correct option is C) 14.742m.