The Richter scale rating of an earthquake of intensity x is given by log (x) - log (xo). where xo is the intensity of a small "benchmark" earthquake. Write the Richter scale rating as a single logarithm. What is the Richter scale rating of an earthquake for which x 100,000,000x? Using a single logarithm, the Richter Scale rating of an earthquake terms of x and x₂ is

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