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At 2:00 PM, a thermometer reading 80°F is taken outside where the air temperature is 20°F. At 2:03 PM, the temperature reading yielded by the thermometer is 42°F. Later, the thermometer is brought inside where the air is at 80°F. At 2:10 PM, the reading is 71°F. When was the thermometer brought indoors?

At 2:00 PM, a thermometer reading 80°F is taken outside where the air temperature is 20°F. At 2:03 PM, the temperature reading yielded by the thermometer is 42°F. Later, the thermometer is brought inside where the air is at 80°F. At 2:10 PM, the reading is 71°F. When was the thermometer brought indoors?

Advanced Engineering Mathematics
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
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At 2:00 PM, a thermometer reading 80°F is taken outside where the air temperature is 20°F. At 2:03 PM, the temperature reading yielded by the thermometer is 42°F. Later, the thermometer is brought inside where the air is at 80°F. At 2:10 PM, the reading is 71°F. When was the thermometer brought indoors?
Transcribed Image Text:At 2:00 PM, a thermometer reading 80°F is taken outside where the air temperature is 20°F. At 2:03 PM, the temperature reading yielded by the thermometer is 42°F. Later, the thermometer is brought inside where the air is at 80°F. At 2:10 PM, the reading is 71°F. When was the thermometer brought indoors?
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