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At 1:00 PM, a thermometer reading 80°F is taken outside where the temperature is constant. At 1:05 PM, the thermometer reads 35°F more than the surrounding temperature. Forty minutes after being taken outside, the thermometer reading differs from the outside temperature by 15°F. Determine the outside temperature. How long will it take for the same thermometer to cool from 100 °F to 60°F in air, which is maintained at 50°F?

At 1:00 PM, a thermometer reading 80°F is taken outside where the temperature is constant. At 1:05 PM, the thermometer reads 35°F more than the surrounding temperature. Forty minutes after being taken outside, the thermometer reading differs from the outside temperature by 15°F. Determine the outside temperature. How long will it take for the same thermometer to cool from 100 °F to 60°F in air, which is maintained at 50°F?

Calculus: Early Transcendentals
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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At 1:00 PM, a thermometer reading 80°F is taken outside where the temperature is constant. At 1:05 PM, the thermometer reads 35°F more than the surrounding temperature. Forty minutes after being taken outside, the thermometer reading differs from the outside temperature by 15°F. Determine the outside temperature. How long will it take for the same thermometer to cool from 100 °F to 60°F in air, which is maintained at 50°F?
Transcribed Image Text:At 1:00 PM, a thermometer reading 80°F is taken outside where the temperature is constant. At 1:05 PM, the thermometer reads 35°F more than the surrounding temperature. Forty minutes after being taken outside, the thermometer reading differs from the outside temperature by 15°F. Determine the outside temperature. How long will it take for the same thermometer to cool from 100 °F to 60°F in air, which is maintained at 50°F?
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