Part (a) A cup of coffee has a temperature of 95 degrees C and takes 30 minutes to cool to 61 degrees C in a room with a temperature of 20 degrees C. Show that the temperature of the coffee after t minutes is T( t ) = 20 + 75e^(-kt) Part (b) What is the average temperature of the coffee during the first half hour?

Calculus: Early Transcendentals
8th Edition
ISBN:9781285741550
Author:James Stewart
Publisher:James Stewart
Chapter1: Functions And Models
Section: Chapter Questions
Problem 1RCC: (a) What is a function? What are its domain and range? (b) What is the graph of a function? (c) How...
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Part (a)

A cup of coffee has a temperature of 95 degrees C and takes 30 minutes to cool to 61 degrees C in a room with a temperature of 20 degrees C. Show that the temperature of the coffee after t minutes is T( t ) = 20 + 75e^(-kt)

Part (b) What is the average temperature of the coffee during the first half
hour?

Note: The average value of the function T on the interval [a,b]is given by T(avg) = (1/(b-a)) * integral from a to b of T(t)* dt

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