What is the greatest common factor of the monomials- 24x^4y^2, 84xy^4, 30x^2y^2

Geometry answer picture question pls . reason and statements

27 is what percent of 108? 27 is % of 108

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%