A100-w light bulb is plugged into a standard 120 v outlet. how much does it cost per month (31 days) to leave the light turned on?

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

Cost of kWh = 6.5 cents (assumed)

Cost in a month is given by

The cost per month is 4.836 dollars per 31 days

i think the answer is a, hope this : )

prndulum needs thread, weight clock to time swings