Sales tax? i have no idea how to do

The highest point on earth is the peak of mount everest if you climb to the top you would be approximately 29,035 feet above sea level at remembering that amount is 5280 feet percentage of the height of the mountain would you have to climb to reach a point 2 miles above sea level

Does anyone know how to do geometryme with this problem

Look at triangle wxy what is the length (in centimeters) of the side wy of the triangle?