​ question about temperature

t = 2   hrs 

A = 145 - 25 = 120

Te =  25 

T(t) = 70 =  120 e^(k *2) + 25     solve for k = - . 49041

T(t) = 120 e^(- .49041 t )   + 25 

  40 = 120 e^(-.49041 t) + 25          solve  for t = 4. 24 hours 

( Let me know if this is incoorrect and I will re-evaluate)