A Biologist Wants to Know the Width W of a River

Multiple Choice

A biologist wants to know the width w of a river so that instruments for studying the pollutants in the water can be set properly.From point A the biologist walks downstream $x = 140$ feet and sights to point C (see figure) .From this sighting,it is determined that ? = 54°.How wide is the river?? (Round your answer to three decimal places. ) ?

A) 212.693
B) 197.693
C) 207.693
D) 202.693
E) 192.693