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,

Question

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 x 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

Answer 1

This is merely arithmetic!

S = 335000e^(-0.7)(5)

30000 = 335000e^(-0.7)(x)