Solve the Problem $M ( x ) = \log \left( \frac { x } { 10 ^ { - 3 } } \right)$

Multiple Choice

Solve the problem.
-The Richter Scale measures the magnitude M of an earthquake. An earthquake whose seismographic reading measures x millimeters 100 kilometers from the epicenter has magnitude M given byven by $M ( x ) = \log \left( \frac { x } { 10 ^ { - 3 } } \right)$ . Give Giv
The magnitude of an earthquake that resulted in a seismographic reading of 68,549 millimeters 100 kilometers
From its epicenter. Round to the nearest tenth.

A) 1.8
B) 6.8
C) 8.8
D) 7.8