Mark went to the hobby shop and bought 2 lego sets at $38.95 each and some remote car. If he spent a total of $121.85, what was the cost of the remote car?

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%