Lauren simplified the expression
as shown
(m-) = m+7+(-5) = m+12 - 1
m12
Which statement explains Lauren's error?

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%