Because of the curvature of the earth, the maximum distance D that you can see from the top of a tall building of height h is estimated by the formula
D = √ 2rh + h2
where r = 3960 mi is the radius of the earth and D and h are also measured in miles. How far can you see from the observation deck of a tall building, 1170 ft above the ground? (Round your answer to one decimal place.)