Hi,

I'm stuck in this problem. Can somebody help me?

After discontinuing all advertising for a certain product in 1994 ,the manufacturer noted that sales began to drop according to the model

s = 500,000/(1+.6e^(kt))

where s represents the number of units sold and t = 0 represents 1994. In 1996, the company sold 300,000 units

a) complete the model by solving for k

b) estimates sales in 1999

Thank you ...(really!)

Isabel