A robotic submarine is exploring a deep freshwater lake. The total pressure on the robotic submarine is due to both the water above it and the Earth's atmosphere.
The pressure of the air on the surface of the water is 1 atmosphere1\text{ atmosphere}1 atmosphere. An additional depth of 10 m of water is equivalent to 1 atmosphere1\text{ atmosphere}1 atmosphere.
Identify the total pressure, in atmospheres, acting on the robotic submarine at a depth of 30 m.
111
333
444
555