Which of the following is an even function? A. y = x ⁵ − √ x B. y = 2 + | x | C. y = x − 5 D. y = x ⁵ − x ³ E. y = 2 x ³ + 4 x

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%