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Need help with this question 21. The temperature of a cup of coffee after being poured into a room with constant temperature can be modeled

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21. The temperature of a cup of coffee after being poured into a room with constant temperature can be modeled by the equationT (t) = 70 + 60e -0.1t where Tis the temperature in degrees Celsius and z is the time in minutes. [3 Marks Each] a) Find the average rate of change in temperature between 5 and 10 minutes. b) Using the estimation of h = 0.01, find the instantaneous rate of change at 7 minutes

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