7) A can of soda with a temperature of 56 degrees Fahrenheit is placed in a refrigerator which is set to the F.D.A. recommended temperature of 35 degrees Fahrenheit. After 15 minutes the temperature of the soda is 48 degrees Fahrenheit. Assuming, that the can cools according to Newton's law of cooling answer the following. a) What is the differential equation that models this problem? b) After how long will the soda be 40 degrees Fahrenheit?

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