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Mathematics
Problem
The temperature
T
T
T
(in °C) of a cup of coffee is recorded
t
t
t
minutes after pouring. At
t
=
5
t=5
t
=
5
, the derivative is
T
′
(
5
)
=
−
3
°C/min
T'(5)=-3\;\text{°C/min}
T
′
(
5
)
=
−
3
°C/min
. Interpret the meaning of this value in the context of the cooling coffee.
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