A. Between 2005 and 2008 , the average rate of inflation was about 3.6 % per year.If a cart of groceries cost $110 in 2005, what did it cost in 2008 ?A cart of groceries cost approximately $____in 2008.B.   A toxic radioactive substance with a density of 7milligrams per square centimeter is detected in the ventilating ducts of a nuclear processing building that was used 55 years ago. If the half- life of the substance is 20 years, what was the density of the substance when it was deposited 55years ago?The density of the radioactive substance when it was deposited 55 years ago was approximately was approximately_____mg/ cm squared

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