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Suppose that a cup of soup cooled from 90C to 50C after 25 minutes in a...

Suppose that a cup of soup cooled from 90C to 50C after 25 minutes in a room whose temperature was 20C. Use Newton's law of cooling to answer the following questions.

a. How much longer would it take the soup to cool to 30C? (in minutes)

b. Instead of being left to stand in the room, the cup of 90C soup is put in the freezer whose temperature is -15C. How long will it take the soup to cool from 90C to 30C?

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