Question

You have a 100-watt light bulb on your front porch that is turned on 10 hours every night. If the cost of electricity is 12 cents per KWHR (kilowatt-hour), how much does that bulb add to your monthly electric bill? Give your answer in US dollars ($). Remember 100 cents = $1.

Answer 1

The 100-watt light bulb would add $3.60 to your monthly electric bill.

Step-by-step explanation:

To calculate the cost of electricity for the 100-watt light bulb, you need to determine the total energy consumed in kilowatt-hours (kWh) and then multiply it by the cost per kWh. The energy consumed can be calculated by multiplying the power of the bulb (100 watts) by the time it is turned on (10 hours). So, the energy consumption is 100 watts x 10 hours = 1000 watt-hours or 1 kilowatt-hour (kWh).

The cost per kWh is given as 12 cents, which is equal to $0.12. Now, multiply the energy consumption (1 kWh) by the cost per kWh ($0.12) to get the cost of electricity for one night. So, the cost of electricity for one night is 1 kWh x $0.12/kWh = $0.12.

To find the monthly cost, multiply the cost of electricity for one night by the number of nights in a month. Assuming there are 30 nights in a month, the monthly cost would be $0.12 x 30 = $3.60. Therefore, the 100-watt light bulb would add $3.60 to your monthly electric bill.