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6.7 Exercise 64

Avg difficulty 2.5

Use this scenario: A pot of warm soup with an internal temperature of $\text{100}°$ Fahrenheit was taken off the stove to cool in a $\text{69}°\textrm{ }\text{F}$ room. After fifteen minutes, the internal temperature of the soup was $\text{95}°\textrm{ }\text{F} .$

To the nearest minute, how long will it take the soup to cool to $\text{80}°\textrm{ }\text{F}?$

OpenStax Algebra and Trigonometry 2e, 6.7 Exponential and Logarithmic Models, exercise 64

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Adapted from College Algebra © 2021 Rice University. Licensed under CC BY 4.0. Sources: College Algebra 2e, Algebra and Trigonometry 2e, Precalculus 2e, College Algebra with Corequisite Support 2e. Imported at revision 4922e46.