Which of the following is NOT a step in problem solving?

Correct Answer: C

Rationale: Problem-solving steps include collecting data (gathering facts), identifying the problem (defining it), and determining a plan (acting) e.g., addressing a patient's fever by checking vitals, diagnosing infection, and medicating. Stating a null hypothesis (e.g., 'no effect') is a research step, testing assumptions scientifically, not a general problem-solving action in nursing practice. Nurses solve issues practically e.g., adjusting IV flow without formal hypotheses, which suit studies (e.g., drug trials). The other steps align with clinical decision-making, making null hypothesis the outlier, irrelevant to routine problem-solving's immediate, action-oriented focus.

Correct Answer: A

Rationale: 1800 ml converts to 1.8 liters (1000 ml = 1 L).

Correct Answer: B

Rationale: Genu-pectoral is synonymous with knee-chest.

Correct Answer: A

Rationale: Pulse pressure is systolic minus diastolic: 150 - 96 = 54.

Correct Answer: D

Rationale: Aging causes all these vascular changes, impacting circulation.