You fly a hot air balloon 5.0 miles above the ground. What is the measure of BD⌢BD⌢, the portion of Earth that you can see? Round your answer to the nearest tenth. (Earth's radius is approximately 4000 miles.)
+36916 arccos 4000 / 4005 = 2.863o
(2.863 x 2)/360 x 4000 pi = ~~ 200 miles
