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 l =102 feet and sights to point C. From this
sighting, it is determined that θ = 60◦.

How wide is the river?
Answer in units of f

Question

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 l =102 feet and sights to point C. From this
sighting, it is determined that θ = 60◦.

How wide is the river?
Answer in units of f

anonymous · Answer

attachment

anonymous · Answer

use tangent to solve.  tan(60 degrees) = O/A

A = 102, solve for O

O = tan(60 degrees)(102)

= 176.7 ft.