Question

A pan from the oven is sitting out to cool to room temperature. If the temperature difference between the pan and room temperature is currently 174°C and is decreasing by 5% every minute, how much above room temperature will the pan be in 21 minutes?

Answer 1

Answer: 59.26°

Explanation:

Use the equation 174(0.95)^21

The 174 represents the temperature difference

The 21 represents the amount of time (in minutes) that has passed

To get 0.95, because the temperature is decreasing, you subtract

1-0.05=0.95 (0.05 and not 5 because you move the decimal over two places when working with percents)

That's the standard equation that you use when solving questions like these, and when you solve this equation you should get 59.26° (you need a calculator to solve it all at once)