Apackage states that there are 60 calories in 12 crackers and 75 calories in 15 crackers. since the relationship is proportional, how many calories are there in 180 crackers?

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%