Answer :
Final answer:
The total length of the Andes is 7700 km.
Explanation:
The total length of the Andes can be calculated by adding the length from east to west with the length from north to south. The Andes measure 7000 km from east to west and 700 km from north to south, so the total length is 7700 km. Therefore, the correct answer is option 3) 7700 km.
