Question

Not enough air is pumped into an inflatable life raft to make completely filled out the atm pressure is 14.7psi what is the pressure inside the raft explain

Answer 1

If you do not inflate the life raft to make completely filled out, as long as you do not press or squeeze  the life raft, the air inside it will be in equilibrium with the air outside the raft, and so the pressure inside the life raft will be the same atmospheric pressure, 14.7 psi.

Note that when the raft is swollen, if you punch it, the air will leave from it which means that the pressure inside is greater than the atmospheric pressure.