150% of 48 as a percent

1. are the triangles similar and if so why? what is the value of x? show your work.

Me. i can't figure out this question. give an explanation too. .

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%