In 1906, an earthquake of magnitude 8.25 hit San Francisco, California. Indonesia was hit by an earthquake of magnitude 8.5 in 1938. Compare the intensity of the
two earthquakes.
+
I know the answer is : 1.78 but don’t know the steps to get the answer.

Astudent found the solution below for the given inequality. |x-9|< -4 x-9> 4 and x-9< -4 x> 13 and x< 5 which of the following explains whether the student is correct? -the student is completely correct because the student correctly wrote and solved the compound inequality. -the student is partially correct because only one part of the compound inequality is written correctly. -the student is partially correct because the student should have written the statements using “or” instead of “and.” -the student is completely incorrect because there is no solution to this inequality.