A political scientist surveys 40 of the current 122 representatives in a state's congress. What is the size of the sample:

What is the size of the population:

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.