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Mathematics 7 Online
OpenStudy (anonymous):

world problem multiple choice in 2009 an earthquaike of magnitude 6.7 shook the kermnadec islands off the coast of new zealand. Also in 2009, an earthquake of magnitude 5.1 occured in the Alaska peninsula. how many times stronger was the kermadec earthquake than the alaska earthquake 39.811 5 .77 20.593 0.025

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