Can sum1 do this chem problem? maybe just a set up...not all the calculations?

If 45.0 ml of ethanol (den= .789 g/ml) initially at 8.0 degrees C is mixed with 45.0 ml of water (den=1.0 g/ml) initially at 28.6 deg. C in an insulated beaker, and uming that no heat is lost, what is the final temperature of the mixture?