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What is this inequality notation? t is less then or equal to 2

Will give brainliest what is the value of x? enter your answer in the box.

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%