7. A hiker whose eyes are 5.5 feet above ground stands 25 feet from the base of a redwood tree. She looks up at an angle of 71 to see the top of the tree. To the nearest tenth of a foot, what is the height of the tree? 8. Error Analysis To find the distance XY across a large rock formation, a student stands facing one endpoint of the formation, backs away from it at a right angle for 20 meters, and then turns 55 to look at the other endpoint of the formation. The student's calculations are shown. Critique the student's work. 20 m Z 71 25 ft 55 tan 55 = = 20 XY 5.5 ft XY . tan 55 = 20 20 XY= 14.0 m tan 55