Modeling Practice 43. Business: Advertising The management of a large chain of frozen your Stores in New England believes that f days after the end of an advertising cam paign, the volume V of sales is approximated by V(1) = 65,000 + 65,000e-0.461 At what rate is the sales volume changing a. I day after the end of the advertising campaign? b. 6 days after the end of the advertising campaign