1. The problem statement, all variables and given/known data A cup of boiling water is placed outside at 1:00 PM. One minute later the temperature of the water is 152 degrees Fahrenheit. After another minute its temperature is 112 degrees Fahrenheit. Find the outside temperature. 2. Relevant equations None. 3. The attempt at a solution T(t)=Ta+(To-Ta)e^(-kt) T(t)=Ta+(212-Ta)e^(-kt) T(1)=152=Ta+(212-Ta)e^(-k) T(2)=112=Ta+(212-Ta)e^(-2k) 152-Ta=(212-Ta)e^(-k) 112-Ta=(212-Ta)e^(-2k) 112/152=e^(-k) e^k=152/112 k=ln(19/14) Now I'm stuck. What do I do?