Posted by **Evan** on Tuesday, April 10, 2007 at 8:49pm.

S'(t)= -147.78e^(-0.2t)

S=7389 units when t=0

find the function that describes the number of daily sales t days after the end of the campaign

Really stuck can someone help me to just find the function so I can head in the right track for the rest of the question