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10 June, 11:30

The formula C = 5 (F - 32) can be used to convert Fahrenheit temperatures F to 9 Celsius temperatures C. For what Fahrenheit temperatures is the Celsius temperature lower than 45 degrees C?

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  1. 10 June, 13:29
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    The given formula C=5 (F-32) should properly read C = (5/9) (F-32), or

    9C=5 (F-32).

    Using the corrected formula, F = (9C/5) + 32, so for C<45,

    F< (9*45/5) + 32=113 degrees

    Incidentally, these are the temperatures that yeast can survive. Above 45 degrees C, they might die of heat!
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Home » Mathematics » The formula C = 5 (F - 32) can be used to convert Fahrenheit temperatures F to 9 Celsius temperatures C. For what Fahrenheit temperatures is the Celsius temperature lower than 45 degrees C?
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