A nurse is assessing a school-age child whose blood glucose level is 280 mg/dL. Which of the following findings should the nurse expect?

The correct answer is B: Lethargy. A blood glucose level of 280 mg/dL in a school-age child indicates hyperglycemia, leading to lethargy due to the body's inability to properly utilize glucose for energy. Pallor (choice A) is not typically associated with high blood glucose levels. Shallow respirations (choice C) are more commonly seen in conditions like respiratory distress. Tremors (choice D) are often seen in hypoglycemia, not hyperglycemia. Therefore, the most appropriate finding to expect with a blood glucose level of 280 mg/dL is lethargy.