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A thermometer reading 68 ∘ F is placed in an oven preheated to a constant temperature....

A thermometer reading 68 ∘ F is placed in an oven preheated to a constant temperature. Through a glass window in the oven door, an observer records that the thermometer reads 264 ∘ F after 1 2 minute and 357 ∘ F after 1 minute. How hot is the oven?

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