Answer:
<em>That is, the wave amplitude in a level 6 earthquake is 10 times greater than in a level 5 earthquake, and the amplitude increases 100 times between a level 7 earthquake and a level 9 earthquake. The amount of energy released increases 31.7 times between whole number values.</em>
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On what
cant really see the picture
The answer is 7
If you substitute -7 into x you get
4-(-3) which is also 4+3