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The cell phone plan from Company C cot $10 per month, plu $15 per gigabyte for data ued. The plan from Company D cot $80 per month, with unlimited data. Rule C give the monthly cot, in dollar, of uing g gigabyte of data on Company C' plan. Rule D give the monthly cot, in dollar, of uing g gigabyte of data on Company D' plan. Write a entence decribing the meaning of the tatement C(2) = 40