PreCalculus - Logarithmic & Exponential Functions (16 of 20) Newton's Law of Cooling

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In this video I will find t=? and k=? of Newton's Law of Cooling given initial temperatures.

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can u help me sir? A substance takes 3 min in cooling from 50C to 45C and takes 5min in cooling from 45C to 40C. What is the temperature of surrounding?

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