Can someone please explain this??I don’t get it at all...I need help!!! Write the three pairs of parallel segments in triangle ASR

What is the size of the matrix resulting from

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%

Consider circle o, where and . m∠bpd °. °.