Question: Problem 3.4: At a coffee shop where the temperature is kept at a constant A = 70F, I got a cup of coffee whose temperature

 Problem 3.4: At a coffee shop where the temperature is kept

Problem 3.4: At a coffee shop where the temperature is kept at a constant A = 70F, I got a cup of coffee whose temperature was T, = 200F. I waited for 10 minutes, and the coffee's temperature dropped to T;p = 150F. If I want to drink it at precisely T, = 90F, how much longer should | wait

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