An elderly patient goes missing at 9:00 in the morning and is not found until 17:30. How many hours was the patient missing?

From 9:00 to 17:00 is 8 hours. From 17:00 to 17:30 is another 30 minutes, so the patient was missing for 8 hours and 30 minutes. The correct choice is B, “8 hours and 30 minutes.”

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