Two glasses of milk and 3 snack bars have a total of 61 carbohydrates​ (carbs), and 3 glasses of milk and 2 snack bars have a total of 64 carbs. Determine how many carbs are in one glass of milk and in one snack bar.

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%