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Mathematics 8 Online
OpenStudy (karlaltr):

A student records the internal temperature of a hot sandwich that has been left to cool on a kitchen counter, The room temperature is 90 degrees celcius. An equation that models this situation is T (t) = 63(0.5)^t/10 +19 How much time did it take for the sandwich to reach an internal temperature of 30 degrees celcius?

OpenStudy (karlaltr):

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