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Mathematics 11 Online
OpenStudy (anonymous):

Medal and fan! :) In 2009, an earthquake hit Costa Rica, registering a 6.1 on the Richter scale. What was the intensity of this earthquake, assuming the reference value was 1? (R = log ( I I0 )) 5.1 4.46 × 102 1.26 × 105 1.26 × 106

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