- Probability statistics question?

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How would you measure the horsepower developed in walking the track? What is the approximate ratio of [NO2-] to [HNO2] in order to buffer a solution at pH=4.0? Find the inverse function.
y=3^11x f^-1(x)= ?? I got the answer x/177147 but it appears to be incorrect.? What is the frequency of a thunder storm? I am having trouble with my organic chem hw. The question asks to "propose a mechanism for the acid-catalyze isomerization of (-)-menthone."?