What are the coordinates of the image of the point (4, 2) after a dilation with a center of (0, 0) and a scale factor of 2?

What is the equation of the graph below? y=sec(x)-4

For the equations below which statement is true ?

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?