Answer:34.83
Explanation:
4.5kwh+ 9kwh Is 13.5kwh which is how much is being used with both the freezer and a washing machine
It cost 21.5 per kWh so multiply 13.5 by 21.5 to get 290.25
To see what it would be in a year multiply 290.25 by 12(months in a year) to get 3483