ALPHA DIVISION

Question 14

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Question

A cup of water is initially at

2^\circ\mathrm C

and is left in a room of constant temperature

22^\circ\mathrm C

. The difference between the water temperature and room temperature decays exponentially. If the water takes

10

minutes to warm to

12^\circ\mathrm C

, find its temperature, in degrees Celsius,

20

minutes after the initial time.

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