# SOLUTION: Hi, I hope someone can help me. My problem is: Niagara Electric charges a flat fee of \$8.50 for the first 1000 kilowatt hours used, \$0.05 per kilowatt hour for the next 4000 ki

Algebra ->  Algebra  -> Rational-functions -> SOLUTION: Hi, I hope someone can help me. My problem is: Niagara Electric charges a flat fee of \$8.50 for the first 1000 kilowatt hours used, \$0.05 per kilowatt hour for the next 4000 ki      Log On

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 Algebra: Rational Functions, analyzing and graphing Solvers Lessons Answers archive Quiz In Depth

 Click here to see ALL problems on Rational-functions Question 289867: Hi, I hope someone can help me. My problem is: Niagara Electric charges a flat fee of \$8.50 for the first 1000 kilowatt hours used, \$0.05 per kilowatt hour for the next 4000 kilowatt hours, and \$.04 per kilowatt hour for each hour used thereafter. What is the expression for the cost function, C(x), using standard notation?Answer by ankor@dixie-net.com(15660)   (Show Source): You can put this solution on YOUR website!Niagara Electric charges a flat fee of \$8.50 for the first 1000 kilowatt hours used, \$0.05 per kilowatt hour for the next 4000 kilowatt hours, and \$.04 per kilowatt hour for each hour used thereafter. What is the expression for the cost function, C(x), using standard notation? : I think you need two expression x =< 5000 kwh C(x) = .05(x-1000) + 8.50 and x > 5000 kwh,(add 1 cent per kwh for 4000 kwh) C(x) = .04(x-1000) + 40.00 + 8.50 C(x) = .04(x-1000) + 48.50