28/z- z/4+1 1/8 when z =4

Which one is true about the hexagons ?

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.

The area of square garden is 300m squared. how long is the diagonal?