Concept:Metric conversions: 1 hectometer (hm) = 100 meters (m), and 1 decameter (dam) = 10 meters (m).Explanation:Convert 22 hm to meters: 22×100=2200 m.Convert 8 dam to meters: 8×10=80 m.Add the two results: 2200+80=2280 m.Thus, 22 hm 8 dam equals 2280 meters.Answer:2280 m (Option C)