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A cold metal bar at 30 C is submerged in a pool maintained at a temperature of 70C. After 10 seconds, the temperature of the

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A cold metal bar at 30" C is submerged in a pool maintained at a temperature of 70C. After 10 seconds, the temperature of the bar is 200 How long will it take for the bar to attain a temperature of 30C? (Use decimal notation. Give your answer to one decimal place. Round any intermediate calculations, if needed, to no less than four decimal places.)

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