The deepest point in the ocean is 11 km below sea level, deeper than MT....

The following provides the pressure equation:
${\displaystyle P=P_0+pgd=1.013\times {10}^5+1030\left(9.8\right)\left(11000\right)=1.1\times {10}^8=\frac{1.1\times {10}^8}{1.013\times {10}^5}=1096atm}$

Concepts and reason 
The concepts required to solve the given questions is the pressure in the atmosphere at the depth.
Initially, calculate the depth form km to m. Later, write an expression for the pressure at the depth. Finally, calculate the pressure in the atmosphere at this depth. 
Fundamentals 
The following is the term for the atmosphere at a certain depth:
Here, is the initial atmospheric pressure, D is the density of water, g is the acceleration due to gravity, and h is the deepest point in the ocean.
The depth in km is equal to, 
$h=11km$
Then, change it to m as follows:
$h=11km(\frac{{10}^{3}m}{1km})$
$=11000m$
Solution: 
The depth of the ocean is converted from km to m on multiplying by a factor of ${10}^3$
Substitute 1.00 atm for $P_0$, $1030kg/m^3$ for D, $9.8m/s^2$ for g, and 11000 m for h in the equation $P=P_0+D_{gh}$. 
$P=1.00atm+(1030kg/m^3)(9.8m/s^2)(11000m)$
$=1.00atm+1096.09atm$
$=1097.09atm$
The pressure in the atmosphere at the depth is equal to 1097.09 atm. 
Explanation: 
The density of the water is equal to $1000kg/m^3$. However, we must determine the depth of the ocean at that particular point. The ocean contains salt water so, we have to use density of the salt water.