Similar right triangles, i need help with this please

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?

If the simple annual interest rate on a loan is 6, what is the interest rate in percentage per month?

1: 4 if the wew 35 surfboards at the beach how many were short boards?