D = 1.2 square root h horizon in miles D

Question

from a height h 12000 feet in elevation how far are you from the horizon?
use correct mathematical symbols and explaining thoughtly in words each step.

Answer 1

No much to do except plugging in the given value

D = 1.2√120000
= 1.2(109.54...)
= appr 131.45

From an elevation of 12000 ft, you could see appr 131.45 miles