I need help on this question please!?

Which number produces a rationale number when multiplied by 1/5

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%

Erin bought christmas cards for $2 each to send to her family and friends. which variable is the dependent variable?