SOLUTION: A thermometer that reads 80 degree C is brought into a room that is at 20 degree C. exactly three minutes later, it reads 70 degree C. when will it read 50 degree C?

Algebra ->  Logarithm Solvers, Trainers and Word Problems -> SOLUTION: A thermometer that reads 80 degree C is brought into a room that is at 20 degree C. exactly three minutes later, it reads 70 degree C. when will it read 50 degree C?      Log On


   

Question 240650: A thermometer that reads 80 degree C is brought into a room that is at 20 degree C. exactly three minutes later, it reads 70 degree C. when will it read 50 degree C?
Answer by JimboP1977(311) About Me  (Show Source):
You can put this solution on YOUR website!
10 degree drop in three minutes. So 3 and 1/3 drop in 1 minute
30 degrees divided by 3 and 1/3 equals 9 minutes.
Not sure what logs have to do with this unless I am missing something obvious?