The coordinates of the vertices of quadrilateral HIJK are H(1,4), I (3,2), J (-1,-4), K (-3,-2). If quadrilateral HIJK is rotated 270 degrees about the origin, what are the vertices of the resulting image, quadrilateral H'I'J'K'?

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%