after allowing 5% discount on the market price of a gift item 10% vat charged on it then its price becomes 1672 how much amount was given in the account

The change in water level of a lake is modeled by a polynomial function, w(x). described how to find the x-intercepts of w(x) and how to construct a rough graph of w(x) so that the parks department can predict when there will be no chage in the water level. you may create a sample polynomial of degree 3 or higher to use in your explanations.