A thermometer is removed from a room where the temperature is 70° F and is taken outside, where the air temperature is 10° F. After one-half minute the thermometer reads 40 F. What is the reading of the thermometer at t = 1 min?
(Round your answer to two decimal places.)
And,
How long will it take for the thermometer to reach 15 F°? (Round your answer to two decimal places.)