Question

question 6 a laptop computer consumes about 20 watts per hour when operating. at 10c per kilowatt - hour, how much does a laptop cost to operate for 5 hours? a 1c b 50c c $2.00 d $10.00

Explanation:

Step1: Convert watts to kilowatts

The laptop consumes 20 watts per hour. Since 1 kilowatt = 1000 watts, we convert 20 watts to kilowatts by dividing by 1000: $20\div1000 = 0.02$ kilowatts per hour.

Step2: Calculate energy consumption for 5 hours

To find the total energy consumption in kilowatt - hours for 5 hours, we multiply the power in kilowatts per hour by the number of hours: $0.02\times5=0.1$ kilowatt - hours.

Step3: Calculate the cost

The cost per kilowatt - hour is 10 cents. To find the total cost, we multiply the total energy consumption (in kilowatt - hours) by the cost per kilowatt - hour: $0.1\times10 = 1$ cent.

Answer:

A. 1c