Help please its pretty simple

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?

The tile along the edge of a triangular community pool needs to be replaced? ?

This graph shows a portion of an odd function. use the graph to complete the table of values. x f(x) −2 −3 −4 −6