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What is the volume of this square pyramid?

He weights of 2-pound bags of best dog food are approximately normally distributed with a given mean  and standard deviation  according to the empirical rule, what percentage of the bags will have weights within 3 standard deviations of the mean? 47.5%68%95%99.7%

In an improper fraction, is the numerator equal to, less than, or greater than the denominator