At what value of x does the local max of f(x) occur?

Isee the amount was $90.00 then reduced to $75.00 , what is the percent ?

What is the rotational symmetry of a wheel

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.