Answer
The gauge pressure is $3.23\times 10^7~Pa$, which is $319~atm$.
Work Step by Step
We can find the gauge pressure at a depth of 3200 meters.
$P_G = \rho~g~h$
$P_G = (1030~kg/m^3)(9.80~m/s^2)(3200~m)$
$P_G = 3.23\times 10^7~Pa$
We can convert the gauge pressure to units of atmospheres.
$P_G = ( 3.23\times 10^7~Pa)(\frac{1~atm}{1.013\times 10^5~Pa})$
$P_G = 319~atm$
The gauge pressure is $3.23\times 10^7~Pa$, which is $319~atm$.
