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Why does raw sewage and sewage sludge contain heavy metals? What volume of water must be added to 11.5 mL of a pH 2.0 solution of nitric acid in order to change the pH to 4.0? My question is how can we convert the NITROGEN gas volume from nm3 to m3 ? I am given F ratios and i have to find f?
Example: numerator of df=7, denominator of df=25. How to do this in R programming? If order of abc matrix is 4*3,4*5,7*3 then (a^t.b^t)^t =c^t then what is order by solving proved it. these are transpose?

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