Answer:
4.836 dollars
Explanation:
When the power in watts is multiplied by the amount of time the power is used we get the power in the following form.
The power in kWh is
[tex]P=100\times 31\times 24\times 10^{-3}\\\Rightarrow P=74.4\ kWh[/tex]
Cost of kWh = 6.5 cents (assumed)
Cost in a month is given by
[tex]74.4\times 6.5=483.6\ Cents=\dfrac{483.6}{100}=4.836\ \$[/tex]
The cost per month is 4.836 dollars per 31 days
