Question 193008
D=1.2 sqrt h. gives the distance in miles that a person can see to the horizon from h height in feet. (1 mile = 5,280 feet) 
A solve the equation I got 19360000 feet is this correct. 
B. Long peak in the rocky mtn natl park is 14,255 feet in elevation. How far can you see to the horizon from the top of long peak? Can you see cheyenne Wyoming (about 89 miles away) 
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D = 1.2sqrt(h)
D = 1.2sqrt(14255)
D = 1.2*119.39
D = 143.27 miles
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Yes you could see Cheyenne which is 89 miles away.
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Cheers,
Stan H.