what is the cost to run a single 100 w light bulb for 30 days if the electric company charges $0.18 for every KW-hr?
6 answers
100 * 30*24 / 1000 * 0.18 = $____
$ 400 is that correct
3 * 24 * 0.18 does not equal 400
$129.60
Is that correct
Its 12.96