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Mathematics 13 Online
OpenStudy (anonymous):

Model with mathematics. An electric utility charges residential customers a $6 monthly fee plus $0.04 per kilowatt hour (kWh) for the first 500 kWh and $0.08/kWh for usage over 500 kWh. a. Write a piecewise function f(x) that can be used to determine a customer’s monthly bill for using x kWh of electricity.

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