Use the Formula

Multiple Choice

Use the formula . In October 2004, an earthquake measuring 6.8 on the Richter scale occurred in Japan. The largest quake in Japan since 1990was one in 1993that registered 7.7. How many times more severe was the 1993shock than the one in 2004on the Richter scale? Round your answer to one decimal place.
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A) 0.8 times as severe
B) 6.1 times as severe
C) 7.9 times as severe
D) 8.5 times as severe
E) 17.1 times as severe