Timelimit: 2 hours. 50:15 remaining. [x] The management of a large chain of frozen yogurt stores in New England believes that t days after the end of an advertising campaign, the volume V of sales is approximated by 80, 000 + 80, 000e -0.45t At what rate is the sales volume changing (rounded to 2 decimal places) a. 3 days after the end of the advertising campaign? b. 7 days after the end of the advertising campaign? Points possible: 1 License 1) Unlimited attempts