1. The problem statement, all variables and given/known data At the surface of a freshwater lake the air pressure is 1 atm. At what depth under water in the lake is the water pressure 4.5 atm? 2. Relevant equations P=a+hgp h=(P-a)/(g*p) 3. The attempt at a solution h=(4.5x105 - 1x105)/(9.8*1000)=35.71 I also did the equation with 9,000 Pa converted to atm, which I think it what I'm supposed to do but I still get the incorrect answer.