An electric company charges $7.50 per month plus $0.09 for each kilowatt hour (kwh) of electricity used.
Use C as the total cost and n as the number of kwh. Write an expression that gives the total cost of n kwh of electricity.
You can find the average cost per kwh by dividing total cost by number of kwh. Write the expression that gives the average cost per kwh.
Find the average cost per kwh for 10 kwh, 100 kwh, and 1,000 kwh.
10 kwh You would first start by finding the overall cost
Next plug in 0.84 for C and 10 for n.
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As the number of kwh increases, what happens to the average cost of the kwh? Would the average cost ever fall below $0.09? If so, identify a value that supports your answer. If not, explain how you know.
As the number of kwh increases the average cost of the kwh decreases.
How many kwh should be purchased for the average cost to be $0.12 per kwh?
The average cost of the kwh will approach 0.09 as you use more electricity, never going below it because of the $7.50 monthly charge.
I think that I did all the other problems right, but I am struggling with this class.