An open gift box is shown below. a. Write and simplify a polynomial that represents the area of the base of the box. b. Write and simplify a polynomial that represents the volume of the box. c. Write and simplify a polynomial for the area of the base if the length and width each increase by four inch- (n + 6) inches (2n+1) inches n inches For the toolbar, press ALT+F10 (PC) or ALT+FN+F10 (Mac). B I U S Paragraph Arial 10pt > > III ...