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9.
On the Richter scale of earthquake intensity:A) The ground is shaken 10 times less by a magnitude-4 quake than by a magnitude-5 quake.
B) The ground is shaken 3 times more by a magnitude-3 quake than by a magnitude-1 quake.C) The ground is shaken 10 times less by a magnitude-3 quake than by a magnitude-2 quake.D) The ground is shaken twice as much by a magnitude-5 quake as by a magnitude-2.5 quake.E) A magnitude-8.5 quake is impossible; nothing that big can occur.
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