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A result of a number, what decreased by 15% equal 161. Find that number.
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The distribution of the amount of money spent by students for textbooks in a semester is approximately normal in shape with a mean of $235 and a standard deviation of $20. according to the standard deviation rule, how much did almost all (99.7%) of the students spend on textbooks in a semester?
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A result of a number, what decreased by 15% equal 161. Find that number....
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