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Answer :
Final answer:
To find the time it takes for the coffee to cool from 110ºF to 97ºF, we can use the rate at which the coffee cools and set up an equation.
Explanation:
To find the time it takes for the coffee to cool from 110ºF to 97ºF, we first need to determine the rate at which the coffee cools. From the information given, we know that the coffee cools 90ºF in 15 minutes, which means it cools at a rate of 6ºF per minute. To calculate the time it takes for the coffee to cool from 110ºF to 97ºF, we can set up the equation:
- 110ºF - 97ºF = 6ºF/min * t minutes
- Solving for t, we get t = (110ºF - 97ºF) / 6ºF/min = 2.17 minutes
Therefore, the teacher will drink his coffee approximately 2.17 minutes after it is served.
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