We must take into account the following change of units:
[tex]1kw = 1000w
1 year = 365 days
1 day = 24 hours[/tex]
Applying the change of units we have that the electric consumption for 1 year is given by:
[tex](3) * (1/1000) * (365) * (24) = 26.28 kw * h
[/tex]
Then, the total cost is given by:
[tex](26.28) * (0.0900) = 2.3652
[/tex]
Answer:
the cost of operating a 3.00-w electric clock for a year is:
$ 2.3652
