A cell phone company charges $0.12 for connecting a call plus $0.08 per minute or any part

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A cell phone company charges $0.12 for connecting a call plus $0.08 per minute or any part thereof (e.g., a phone call lasting 2 minutes and 5 seconds costs $0.12 + 3 × $0.08). Sketch a graph of the cost of making a call as a function of the length of time t that the call lasts. Discuss the continuity of this function.
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Calculus

ISBN: 978-0131429246

9th edition

Authors: Dale Varberg, Edwin J. Purcell, Steven E. Rigdon

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