when he was 3 months old, Benjamin Chance weighed 13.9 pounds. The national average for the weight of a 3 month old baby is 12.5 pounds, with the standard deviation of 1.5 pounds. Determine the z - score for ben's weight and write a sentence interpreting it.

Pyotr tchaikovsky sporting goods operates on a 45% overhead based on the selling price, which results in an overhead of $65.34 on the newest version of an air hockey game set. if the air hockey game set costs pyotr tchaikovsky sports $49.32, find the selling price, the markup, and the net profit.