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Question 7 0/8 pts 9 2 0 Details The R.C. Helliot Advertising Company finds that its profits on day t of an advertising campaign is given by P(t) = -2.5t2 + 35t + 37, 000 where P(t) is profit in dollars for day t of the campaign. A) Find a simplified expression for the marginal profit function. (Be sure to use the proper variable in your answer.) MP(t) B) What is the exact rate of change of profits when 8 days have been passed in the campaign? The rate of change is dollars per day. (Your answer may be negative. ) (C) What are their total profits on day 8 of the campaign? Total profits on day 8 are Check Answer Submit and End