If typical kitchen appliance uses 450 watts of power per day, about how many kilowatt hours will it use in 30 days?

a. 14,000 kilowatt hours

b. 360 kilowatt hours

c. 13 kilowatt hours

d. 11 kilowatt hours

e. 320 kilowatt hours

The correct answer is Option E.

Explanation:

We are given that a kitchen appliance uses 450 watts per day and to calculate the power it consumed in 30 days in kilowatts hours, we use the following conversion:

1 day = 24 hours

So, 30 days = 30 × 24

1 kilowatts = 1000 watts

Calculating the power consumed in kilowatts hours, we get:

Hence, the correct answer is Option E.