1. The angle of elevation of a top of a tree from a point 10 meters horizontally way from the tree is twice the angle of elevation at a point 40 meters from it. Find the height of the tree.

2. The submarine captain starts ascending at a constant angle of inclination of 20 degrees so that he can surface in 5000 feet. Changes in pressure are very important in submarine travel, and the pressure in kilopascals, P, is given by the equation P = 2.990d + 101.3, where d= depth. What is the current pressure, P, on the submarine at this depth? Express your answer in kilopascals.