document.write( "Question 1191775: How many times more powerful was the earthquake in Alaska, with a magnitude of 9.2 on the Richter scale, compared to the San Francisco earthquake, which had a magnitude of 7.9 on the Richter scale? \n" ); document.write( "
Algebra.Com's Answer #823611 by math_tutor2020(3816)\"\" \"About 
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\n" ); document.write( "Let's do an example problem before tackling this current one.\r
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\n" ); document.write( "\n" ); document.write( "Let's say we want to compare a 5.0 to a 6.0 on the Richter scale.
\n" ); document.write( "The second value is 10 times greater because 6-5 = 1 and 10^1 = 10.\r
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\n" ); document.write( "\n" ); document.write( "Another example:
\n" ); document.write( "Comparing a 4.0 to a 7.0 means 7-4 = 3 and 10^3 = 1000. So the 7.0 magnitude is 1000 times greater than the 4.0\r
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\n" ); document.write( "\n" ); document.write( "Now onto the current problem:
\n" ); document.write( "As the examples above show, we first subtract the magnitudes to get 9.2 - 7.9 = 1.3\r
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\n" ); document.write( "\n" ); document.write( "Then use a calculator to get
\n" ); document.write( "10^(1.3) = 19.9526
\n" ); document.write( "which is approximate
\n" ); document.write( "The decimal digits go on forever without a known pattern. This decimal value is irrational. \r
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\n" ); document.write( "\n" ); document.write( "Answer: 19.9526 roughly
\n" ); document.write( "Round this however you need
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