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Q29 the emission of sulfur dioxide when high sulfur

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Q29: The emission of sulfur dioxide when high-sulfur coal is burned is restricted by law. New coal-burning plants usually comply with the law by installing expensive equipment to filter sulfur dioxide from their emissions. These new plants could save money by installing instead less expensive cleaning equipment that chemically removes most sulfur from coal before combustion. Which of the following, if known, would be most relevant to evaluating the claim above about how new coal-burning plants could save money? A. Whether existing oil-burning plants are required to filter sulfur dioxide from their emissions B. Whether the expense of installing the cleaning equipment in a new plant is less than the expense of installing the cleaning equipment in an older plant C. Whether the process of cleaning the coal is more expensive than the process of filtering the emissions D. Whether lawful emissions of sulfur dioxide from coal-burning plants are damaging the environment E. Whether existing plants that use the filtering equipment could replace this equipment with the cleaning equipment and still compete with new plants that install the cleaning equipment Answer: ------------------------------------------------------------------------------------------------------------ Q30: Unlike that of earlier works on slavery, Blassingame’s innovative study relies not on the records of White slave owners but on the records of the salves themselves, especially the 70 or so autobiographies and memoirs that have been preserved. 28
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------------------------------------------------------------------------------------------------------------ Q31: In the sixteenth century, the push for greater precision in measuring time was not, like more recently, motivated by complicated philosophical questions about the nature of matter and the universe, but the practical matters of navigation : sailors simply needed more highly accurate timepieces in order to compute their longitude from the positions of the stars. A. not, like more recently, motivated by complicated philosophical questions about the nature of matter and the universe, but the practical matters of navigation B. being motivated by the practical matters of navigation, instead of complicated philosophical questions about the nature of matter and the universe, as it has been recently C. motivated not by complicated philosophical questions about the nature of matter and the universe, like they were more recently, but by the practical matters of navigation D. motivated by the practical matters of navigation, not complicated philosophical questions about the nature of matter and the universe, which was the case more recently E. motivated not by complicated philosophical questions about the nature of matter and the universe, as has been the case more recently, but by the practical matters of navigation Answer: ------------------------------------------------------------------------------------------------------------
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