Question 696349
 Imagine that you are a pirate on watch in a crow's nest so that your eyes are 40 feet above the water.
 Determine the farthest distance from which you could spot the top of a 50 foot tree on a sea-level island.
:
Use the distance (in miles) to horizon formula: d = {{{sqrt((3h)/2)}}}; (h in ft)
Add the height of the crows nest and tree: 90 ft
d = {{{sqrt((3*90)/2)}}}
d = 11.6 miles