Mrs. J. is a 31-year-old female admitted to the critical care unit with respiratory distress after getting the "flu." Her condition worsens; SpO2 is 85% on Venturi mask at 0.50. ABGs show a PaO2 of 50 mm Hg. Her chest x-ray is showing infiltrates. Calculate Mrs. J.’s PaO2/FiO2 ratio, and interpret the findings.