In March 2018, Spire, Inc. had the following rate schedule for natural gas usage in single-family residences.

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In March 2018, Spire, Inc. had the following rate schedule for natural gas usage in single-family residences. 


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(a) What is the charge for using 20 therms in a month? 


(b) What is the charge for using 150 therms in a month? 


(c) Develop a function that models the monthly charge C for x therms of gas. 


(d) Graph the function found in part (c).

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College Algebra

ISBN: 9780135226865

11th Edition

Authors: Michael Sullivan, Michael Sullivan III

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