Evaluate tan 11 pi over 6

Find the sum of 4x^{2} -4+6 and -7^{2} +3x+1

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%