What is the sum of (-0.4) with an exponent on the outside of 2

What is the measure of angle tvu shown in the diagram below

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.

Linda loans her friend $250 with a 5% monthly intrest rate. how much was the whole loan?