If anyone could please help me with both these questions if not then at least do one I would appreciate it a lot! Please and Thank You!

What is the perimeter of square abcd? units units 28 units 37 units

What is the best way to answer questions with a x expression in the question. for example 3x + 10x=?

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%