Question

sallys family got a new robot. the robot is fantastic. it cleans the house,cooks the meals, andeven does sallys homework! does not interrupts sally. apparently mom had disabled that function don't complainadds dad that robot cost me over 5 million dollars not to mention its electricity costs I have to charge it for 8 hours each nigyht and during those 8 hours it requires15,000 watts of electricity dad was looking at the monthly bill, of course I don't get it says dad. what is kwh and why is it 40 cents.A kwh begins sam isa kilowatt hour that means when you run a machine using 1,000 watts for exactly 60 minutes you have to pay 40 cents. Dad was even more confused. so how much does it cowst to chargr sam each night

Answer 1

Answer: $ 48


Explanation:

1) kw-h is a measure electric energy consumption.

2) The cost of electric energy is considered proportional to the number of kw-h (kilo watts - hour) consumed. Thi is:

 cost------- = constant = unit cost = 0.40 $/kw-h
kw-h


3) Then, the total cost is the total number of kw-h times the unit cost. This is:

8 h × 15,000 watts × 1 kw / 1,000 watts × 0.40 $ / kw-h = $48.

That is the cost to charge the robot each night