How to Solve a Newton's Law of Cooling Problem

GiannaMe'arah
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Homework Statement



A thermometer is removed from a room where the air temperature is 20degree C and is taken outside where the temp is -10degree C. After 1 minute the thermometer reading is 3degree C. What is its reading after 3 minutes?

Homework Equations





The Attempt at a Solution


im getting 3degree C after 3minutes, anyone?
 
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