Because of the curvature of the Earth, the maximum distance D that you can see from the top of a tall building or from an airplane at height h is given by the function:
where r = 3960 miles is the radius of the earth and D and h are measured in miles.
a) Find D(0.1) and D(0.2)
b) How far can one see from the observation deck of the CN Tower in Toronto, 1135 feet above the ground?
c) Commercial aircraft fly at an altitude of about 7mi. How far can the pilot see?
