Parker did sit-ups for 3 days in a row. She did 123 sit-ups per day. How many sit-ups did Parker do?

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%