Which of the following are the domain and range that represent the inverse of the function f(x), given the mapping diagram of f(x) below?

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The john nash mall used 17,4000 kilowatt hours in may, with a peak load of 92 kilowatts. the demand charge is $5.95 per kilowatt, and the energy charge is $0.08 per kilowatt hour. the fuel adjustment charge is $0.017 per kilowatt hour. what is the total electricity cost for may?

Marco states that 7.696696669…… is a rational number because it is a repeating decimal. is he correct? justify your answer.