The precise formula for converting Celsius degrees to Fahrenheit degrees is F = 9/5 C + 32.

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The precise formula for converting Celsius degrees to Fahrenheit degrees is F = 9/5 C + 32. An easier-to-use formula that approximates the conversion is F = 2C + 30.
(a) Compare the values given by the two formulas for a temperature of 5°C.
(b) Compare the values given by the two formulas for a temperature of 20°C.
(c) For what Celsius temperature do the two formulas give the same Fahrenheit temperature?
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Finite Mathematics and Its Applications

ISBN: 978-0134768632

12th edition

Authors: Larry J. Goldstein, David I. Schneider, Martha J. Siegel, Steven Hair

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