Question

electric companies usually sell electrical energy in units of _____.
○ kilowatt - hours
○ watts.
○ amperes.
○ volts.

Explanation:

Kilowatt - hours (kWh) is the unit of electrical energy used by electric companies for billing. Watts is a unit of power, amperes of electric current, and volts of electric potential difference.

Answer:

kilowatt - hours