In my classroom there are 72 35-watt (w) light bulbs. how much will it cost to light my room for an entire school year if the cost of electricity is $0.10 per kilowatt-hours (kwh)? my work year is 187 days, beginning at 7: 15 am and ending at 2: 45 pm.

The direct and easy solution for this problem is through dimensional analysis. This is done by cancelling out the same units of dimensions resulting to the unit of what is asked. In this case, the resulting unit should be in $.

The number of hours in a day from 7:15 am to 2:45 pm is 7.5 h. In 187 days, that would be:

187 days * 7.5 h/day = 1402.5 h

The rest of the solution goes:

1402.5 h * $0.1/kWh * 1 kW/1000 W * 35 W/bulb * 72 bulbs =

$353.43

answer: the net deposit amount   (option c)

in order to fill in the deposit slip, michael needs to fill in the amount that he wants to deposit in the bank. without the net deposit amount, he will not be able to deposit the money because it is mandatory for him to mention it, as the bank needs to maintain a record to avoid any inconveniences for the bank and michael in the future.

the bank officer checks and verifies the amount received against the amount written on the deposit slip to process the slip.