We have now found that the heating formula for the metal bar is as follows.T =75eln(7375)t +100We are asked to solve for the time t it takes for the metal bar to reach 85 C. To do so, letT =85and solve for t, rounding the final result to one decimal place.T=75eln(7375)t +10085=75eln(7375)t +100=eln(7375)tt=Therefore, how long (in seconds) will it take the bar to reach 85 C under the given conditions? (Round your answer to one decimal place.)