Final answer:
A blood pressure of 90/40 should be reported immediately as it indicates hypotension and may signal an underlying condition, while the other listed vital signs are within normal ranges.
Step-by-step explanation:
Of the choices given, a blood pressure of 90/40, a temperature of 99.4°F, respirations of 12, and a pulse of 90, the one that should be reported immediately is A.
A blood pressure of 90/40. This is because the normal range for blood pressure is usually between 90/60 and 120/80 mm Hg. A blood pressure reading of 90/40 indicates hypotension, which can be a sign of an underlying condition and could lead to inadequate blood flow to organs.
In contrast, the other values fall within the normal ranges: a temperature of 99.4°F is slightly above average but not typically considered a fever, a respiration rate of 12 is perfectly normal, and a pulse of 90 is also within the normal resting range for heart rate.