Write an equation that properly models the problem below and solve the problem. Frank's electric bill for the month of March was $97.35. The electric company charges a flat monthly fee of $20.00 for service plus $0.17 per kilowatt-hour of electricity used. Approximately how many kilowatt-hours of electricity did Frank use in March?
A. 85.35 kilowatt-hours
B. 77.35 kilowatt-hours
C. 455 kilowatt-hours
D. 571 kilowatt-hours
E. 573 kilowatt-hours
Answer: C
Computer Science & Information Technology
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