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## Homework Statement

rock rises straight upward frim the valley floor. From one point the angle of elevation of the top of the rock is 16.7 deg. From a point 168 m closer to the rock the angle of elevation of the top of the rock is 24.1 deg. How high is the rock.....

I added an attachment... What I thought was correct I did in red... but the way my solution guide had it is in black... I dont understand how their way works.. can some one please help me understand... thank you...

If I understand this, this will help me understand all the other word problems that are similar... I would appreciate it.. thank you.