3.2 Find the domain of f (x)= 3x/x-1 and discuss the function behavior of f near any excluded x-values.

Don't know how to find x given these segment lengths

Astick 2 m long is placed vertically at point b. the top of the stick is in line with the top of a tree as seen from point a, which is 3 m from the stick and 30 m from the tree. how tall is the tree?

What is not true about kl and mn? what is mn? (show )