(Solved): 11 To approximate the length of a marsh, a surveyor walks 275 meters from point \( A \) to point \( ...

11 To approximate the length of a marsh, a surveyor walks 275 meters from point \( A \) to point \( B \), then turns \( 76^{\circ} \) and walks 245 meters to point \( C \) (see figure). Approximate the length \( A C \) of the marsh. Round your answer to one decimal place (10 points)