Concept:Convert all measurements to the same unit (meters) before adding. Explanation:First, convert 800 cm to meters: 800 ÷ 100 = 8 m. Next, 80 m remains 80 m. Then, convert 8 km to meters: 8 × 1000 = 8000 m. Now add: 8 m + 80 m + 8000 m = 8088 m. Answer:D. 8088 m