Final answer:
The total pressure inside the tank is 42.8 atm.
Step-by-step explanation:
The total pressure inside the tank can be found by adding the partial pressures of the oxygen and helium. In this case, the partial pressure of oxygen is 10 atm and the partial pressure of helium is 32.8 atm. So the total pressure inside the tank is 10 atm + 32.8 atm = 42.8 atm.