Will mark brainliest for whoever answers

Ineed on this question me get the answer

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.