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Algebra 17 Online
OpenStudy (anonymous):

A helicopter hovers at an altitude that is a feet above a mountain peak of altitude 5450 feet, as shown in the figure. A second, taller peak is viewed from both the mountaintop and the helicopter. From the helicopter, the angle of depression is 43°, and from the mountaintop, the angle of elevation is 18°. Approximate the distance from peak to peak, if a = 940. (Round your answer to the nearest whole number.)

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