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Problem

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Textbook Expert
Textbook ExpertVerified Tutor
9 Nov 2021

Given information

At first the temperature of the coffee was and the room temperature is .The coffee cools at a rate of   per minute when its temperature is.

Step-by-step explanation

Step 1.

The rate of change of temperature with time is given by the differential equation is  

If   , here    gives the slope of the solution curve at point   . If small line segments with slope  are drawn on several points  , the results are called direction field.

 

The direction field for this problem is shown as follows:

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