In Exercises 9798, write a piecewise function that models each telephone billing plan. Then graph the function.

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In Exercises 97–98, write a piecewise function that models each telephone billing plan. Then graph the function.

$50 per month buys 400 minutes. Additional time costs $0.30 per minute.

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College Algebra

ISBN: 9780134453262

7th Edition

Authors: Robert F Blitzer

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