Allison practices her violin for at least 12 hours per week she practices for 3/4 of an hour each session if allison if allison has already practice 3 hours this week how many more sessions remain for to meet or exceed her weekly practice go

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%