<PRE><B>Question 63924</B>
Where d (w) = 100e^-0.1w 
w = soliciting period in weeks. 
Usually NC requires 2000 donors to accumulate enough donations to serve the purpose 
What is the minimum period required for the exercise before a festive season? 
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Comment: If you let d(w)=2000 and then solve for w you
will get a negative value for w.  Something is wrong 
with the formula.
Cheers,
Stan H.</PRE>