Four equivalent expressions for each expression 50-10

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

Hi, can anyone show me how to do this problem? 100 points for this. in advance

With alll of except for the 2 that i did already