Are these correct? I need to submit this assignment soon! please help!

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

Find the slope of the line that contains the following points. r(-2, 4), s(6, -2)

Find the greatest common factor of -30x 4 yz 3 and 75x 4 z 2.