College Algebra Chapter 1/Section 3 Radius of Earth = 3960 miles Feet in one mile = 5280 [ATTACH=full]3822[/ATTACH] For 53 Let d = hypotenuse (d)^2 + (radius of Earth)^2 = [(radius of Earth) plus (distance above sea level)/(feet in one mile)]^2 (d)^2 + (3960)^2 = [(3960) + (20/5280)]^2 Is this the correct set up? Can you set up 54? I will show the math work?