Final answer:
The branch-circuit demand load for a 21.6 kW electric range installed in a residence is 180 W.
Step-by-step explanation:
The branch-circuit demand load for the electric range can be determined by dividing the power rating of the range by the voltage it operates at. In this case, the electric range has a power rating of 21.6 kW and operates at the same voltage as a residence, which is typically 120 V. Therefore, the branch-circuit demand load for the electric range is:
21.6 kW รท 120 V = 0.18 kW = 180 W
So, the answer is 180 W (option e).