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4.3) A biologist wants to know the width w of a river so that instruments for studying the pollutants in the water can be set
4.3) A biologist wants to know the widthwof a river so that instruments for studying the pollutants in the water can be set properly. From pointA, the biologist walks downstream 100 feet and sights to pointC(see figure). From this sighting, it is determined that=54.How wide is the river?
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