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Jenny and her friend Elaine are attending a rock concert. Elaine had special tickets to the VIP area and is standing 10 m from the stage. Using her portable equipment, she determines that the noise in her section is 100 decibels. Jenny had cheaper tickets and is standing 100 m away. How loud is it where Jenny is standing? Assume that both girls are far enough back that the concert can be approximated as a point source,
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