Only for andrew and jason and cute pie

Hi my sisters and brothers can tell me the answer because i don’t understand the question

What is the frequency of the sinusoidal graph?

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.