An apple pie with an initial temperature of 170 -C is removed from the oven and left to cool in a room with an air temperature of 20 -C. Given that the temperature of the pie initially decreases at a rate of 3.0-C/min, how long will it take for the pie to cool to a temperature of 30 -C? *

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Differential Equations

Have you ever observed the movement of the satellites and rockets or how the planets go around the sun in their orbits? How will you determine their motion? Definitely they follow some scientific laws and these kinds of problems are framed as differential equations.