Use the Formula . ​

Multiple Choice

Use the formula . ​
The San Francisco earthquake of 1906 measured 8.25 on the Richter scale, and the San Francisco earthquake of 1989 measured 7.1. How much more intense was the 1906 quake?
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A) 0.3 times as severe.
B) 1.5 times as severe
C) 5.7 times as severe
D) 10.8 times as severe
E) 14.1 times as severe