The gauge pressure is equal to the absolute pressure minus the atmospheric pressure. We know that the atmospheric pressure is 14.7 psi, then we have:
[tex]\begin{gathered} 11=absolute\text{ pressure-14.7} \\ absolute\text{ pressure=11+14.7} \\ absolute\text{ pressure=25.7} \end{gathered}[/tex]Therefore, the absolute pressure is 25.7 psi.
