Ireally need with this can you answer the questions and say how you came up with it i'm begging you

Write a real-world solution that can be represented by the equation y = 7x be sure to explain what the variables represented in the solution

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?

Write the sine and cosine values of a, b, respectively, in the figure for (1) and (2) + explanation.