Please help me in it! It's very difficult, i'm in 6th and I still don't understand this. Please, help me in this!!!

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?

Solve the following inequalities and show the solution on a number line. 2x+3< 3(4x+5)

These box plots show the number of electoral votes one by democratic and republican presidential candidates for the elections from 1984 through 2012. which statement best compares the spread of the data sets