A hot cup of coffee cools exponentially with time as it sits on the
teacher's desk. Its change in temperature, T. measured in °C, with
respect to time, t, in minutes, is modeled with the following function
T=82(0.6) É + 20
What is the coffee's temperature after 30 minutes?
a 54°C
b43°C
C 73°C
d = 31°C

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