SOLUTION: you are babysitting the neighbors 1 yr old and need ro give the baby a bath. the water in the tub is 120 degrees F which is too hot. you want to wait until it cools to 85 degrees F

Algebra ->  Logarithm Solvers, Trainers and Word Problems -> SOLUTION: you are babysitting the neighbors 1 yr old and need ro give the baby a bath. the water in the tub is 120 degrees F which is too hot. you want to wait until it cools to 85 degrees F      Log On


   

Question 608376: you are babysitting the neighbors 1 yr old and need ro give the baby a bath. the water in the tub is 120 degrees F which is too hot. you want to wait until it cools to 85 degrees F. if the cooling rate of the water is 0.074 and the room tempature is 70 degrees F, how long until you can give the baby a bath?
i have equation +T=%28T0-Tr%29e%5E%28-rt%29%2BTr+
Answer by solver91311(24713) About Me  (Show Source):
You can put this solution on YOUR website!


Plug in the values you know:





A little algebra music, Sammy!



Take the natural log of both sides:



Use



to write:



and use



to write



Then solve for time units. Can't say what time units because you don't say what time units are related to your cooling rate. Though given the numbers, I would guess minutes.



John

My calculator said it, I believe it, that settles it
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