What are the approximate values of the non-integral roots of the polynomial equation?

–5.57

–1.95

0.21

1.27

4.73

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%