Width of a River  A biologist wants to know the width w of a river in order to properly se...

Width of a River  A biologist wants to know the width w of a river in order to properly set instruments for studying the pollutants in the water. From point A, the biologist walks downstream 100 feet and sights to point C (see figure). From this sighting, the biologist determines that θ = 54° How wide is the river?