Evaluate or Simplify the Expression Without Using a Calculator $R = \log \left( \frac { a } { T } \right) + B$

question 97

Multiple Choice

Evaluate or simplify the expression without using a calculator.
-Use the formula $R = \log \left( \frac { a } { T } \right) + B$ to find the intensity $R$ on the Richter scale, given that amplitude a is 431 micrometers, time T between waves is $2.4$ seconds, and B is $2.4$ . Round answer to one decimal place.

• A) \(4.7\)
• B) \(7.6\)
• C) \(2.3\)
• D) \(9.3\)

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