From 1970 to 1990, the average annual rate of decline in preschool blood lead levels, in mcg/dL

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From 1970 to 1990, the average annual rate of decline in preschool blood lead levels, in mcg/dL per year, was approximately.


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A) 1 


B) 5 


C) 15 


D) 17

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McGraw-Hill Education SAT 2017

ISBN: 9781259641657

1st Edition

Authors: Christopher Black, Mark Anestis

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