A national fast-food company has just analyzed the effect of the latest sales promotion. It has determined that the sales for its milkshakes is given by S=335,000e^−0.7x, where S is the weekly sales and xx is the number of weeks that have passes since the end of the sales promotion.

a) What will the sales 5 weeks after the end of the promotion? Round to 2 decimal places.
$___________

b) How many weeks after the end of the promotion will sales drop to $30,000, if no new campaign is started? Round to 2 decimal places.
__________ weeks