The acidity, pH, of rainfall in a region follows a normal distribution with mean 4.5 and standard deviation of .5. What should be the limit so that only most acidic (low pH) 15% of the rainfalls are subject to further chemical analysis? Round your answer to two decimal places.

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The Answer of The acidity, pH, of rainfall in a region follows a normal distribution with mean 4.5 and standard deviation of .5. What should be the limit so that only most acidic (low pH) 15% of the rainfalls are subject to further chemical analysis? Round your answer to two decimal places.

The Acidity, PH, of Rainfall in a Region Follows a Normal