Help me like seriously I don’t understand this at all

Lin is shopping for a couch with her dad and heard him ask the salesperson “how much is your commission? ” the salesperson says that her commission is 5 1/2% of the selling price. a.how much commission will the salesperson earn by selling a couch for $495? b.how much money will the store get from the sale of the couch?

Find the vertex of the function given below y=x^2-6x+1

A(t)=728(1+0.04)^t how much money did aditya originally invest