Assume when adults with smartphones are randomly selected, 53% meetings or classes10 adult smartphone users are randomly selected find the probability that at least 4 of them use their smartphones in meetings or classes

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%