A national fast food company has just analyzed the effect of the latest sales promotion. It has determined that the sales decay for its milkshakes is given by S = 305, 000e-0.4%, where S is the weekly sales and x is the number of weeks that have passes since the end of the sales promotion. a) Determine the sales 4 weeks after the end of the promotion: Round answer to 2 decimal places. Sales = $ b) If no new campaign is started, how many weeks after the end of the promotion will sales drop below 35,000? Round answer to 1 decimal place. Num. weeks =

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