Just do energy spent divided by time to get your answer. With this we can say a human might be able to!
Turn off lights when leaving rooms.
Unplug unused appliances. Even when powered off these appliances use electricity.
Replace regular light bulbs with energy saving bulbs.
A. 1.35 is the number in between 1.2 and 1.5.
To find the answer, take 55 and divide it by 1.85 to get the thickness of one card. In this case the answer would be 29.72973 cm. each.