Please HELP!!!

Dazed

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Jun 15, 2005
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A town's population is given by p(x) = x^2 + 4x + 16, where x= years since 1980 and p(x) is measured in thousands of people. The concentration of CO2 in the atmosphere produced by a given population in this area is given by C (p) = 10 + 5ln(p), where p is measured in 1000's of people and the C(p) is measured in ppm. Use this information to compute how fast the CO2 concentation was growing per year in 1995 in this town.

Since I need to find the answer for 1995, x = 15 years

I know that the derivative of the 1st equation is p'(x) = 2x+4
The second derivative is p''(x) = 2

I don't understand what else am I supposed to do. I know I'm supposed to plug in 15 years in one of these equations. Once I do that, then what do i do? Can someone please help me step by step with this problem.....
 
You want to find dC/dx (though I would have used t instead of x since it is time)
Use the chain rule.
dC/dx = dC/dp * dp/dx
then plug in x=15
 
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