Which best describes the clusters in the data set

Find the multiplicative inverse of 8-12i

Which inequality is equivalent to -3x < -12? x < 4 , x < -4 , x > 4, x > -4

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%