A satellite is circling 112 miles above the earth, as shown in the figure. When the satellite is directly above point B, angle A is found to be 76.6°. Use this information to find the radius of the earth. Round your answer to the nearest mile.
?
?
?
?
A. 4,000 mi
B. 4,006 mi
C. 4,002 mi
D. 3,986 mi
E. 4,012 mi
Answer: C
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, 
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, 
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