Which of the objects shown below could be sliced to create square cross-sections?

cone

sphere

cylinder

cube

triangular prism

right pyramid

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%