1. A wooden plank is leaning against a wall. The bottom of the plank is 3 feet from the wall. Answer each of the following questions, and show all of your work

http://s1342.photobucket.com/user/babyjens/media/stuff/Screenshot_14_zps019cb32f.png.html?sort=3&o=0


a) Find AC, the approximate length of the plank. Round to the nearest tenth of a foot.
b) Find BC, the height off the ground where board touches the wall. Round to the nearest foot.

This seems to be a popuar question - see: https://www.askmehelpdesk.com/math-sciences/trig-problem-748933.html