Answer:
the answer is B
Step-by-step explanation:
Your welcome.
we know that

The company charges
cents per kilowatt-hour of electricity
Step
Find the cost for the light bulb
a) in one day


Cost=$
b) In a year



Cost=$
Step
Find the cost for the led bulb
a) in one day


Cost=$
b) In a year



Cost=$
Step
Find the difference in cost
therefore
the answer is

Add 145, 156, 210. and 255 then divide by 4. The mean equals 184.