In the figure, m∠1=m∠2 = 22 and m∠3 = m∠4 = 123. find m∠tsk.

choices:
33
35
45
22

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%