Posted by Bandit on Sunday, October 9, 2011 at 8:29pm.
based on data from 1995 to 1999, the average annual warnings in the paper and allied products manufacturing industry may be maodeled by
E(t)=1335t+39408 dollars per employee
and the average number of emplyees in the same industry cab be modeled by
N(t)=t^3+5.571t^212.29t+684.9 thousand emplyees
where t is the number of years since 1995
in 1999, at what rate was employers spending on paper and allied products manufacturing industry emplyee earning increasing

calculus  Reiny, Sunday, October 9, 2011 at 9:27pm
I have no idea what you are saying.
Why are there warnings in the paper industry? 
calculus  Steve, Monday, October 10, 2011 at 10:28am
Hmmm. Let's say "earnings" instead of "warnings" and all becomes clear.
E(t) = earnings/employee
earnings = earnings/employee * employees
So, we want P(t) = E(t)*N(t) for total earnings
P' = E'N + EN'
go for it. These are just simple polynomials. 
calculus  Steve, Monday, October 10, 2011 at 10:29am
Actually, num of employees = 1000*N