Helpp i have 12 minutes

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?

Find the area of the regular hexagon if a side is 20 cm.

Simplify. 3(4+4x) (type your answer in with no spaces)