A sealed tank containing seawater to a height of 11.0 m also contains air above the water at a gauge pressure of 3.00 atm. Water flows out from the bottom though a small hole. Calculate the speed with which the water comes out of the tank.

I believe this has something to do with Torricelli's theorem, but I am unsure what to do because the tank is closed with pressure?

I believe this has something to do with Torricelli's theorem, but I am unsure what to do because the tank is closed with pressure?