It seems you need to move the decimal three times over, then you round the number. So the answer would be 5.5 x 10^3.
Because this happens in the pacific rim, where the most volcanoes and volcanic islands are found
The answer is E.
A, B, C, and D are either irrelevant or already included.
Antarctica is the furthermost south land on Earth
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Canada, Mexico, and the United States
