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**1. Homework Statement**

An empirical formula relating pressure and density for seawater w/ temperature constant is:

p/pa = (k+1)(d/da)^7-k

pa - pressure condition on the surface

da - density condition on the surface

k - dimensionless constant

Using this formula in the hydrostatics relation, determine the pressure as a function of depth.

**2. Homework Equations**

Hydrostatic relation: dp/dz = -dg where d is density

T=T0-kz

d=P/RT

**3. The Attempt at a Solution**

I tried to replace d w/ P/RT and then T w/ T0-kz to get the equation in terms of z. When I tried to take the derivative it was getting very complicated and I couldn't get it to work. I think I'm just approaching the problem incorrectly. I was wondering exactly how to start this problem. I know in order to take the derivative w/ respect to z there needs to be a z in the equation.

**1. Homework Statement**

**2. Homework Equations**

**3. The Attempt at a Solution**