The annual net sales (revenue) earned by the Finnish cell phone company Nokia fr

Question

The annual net sales (revenue) earned by the Finnish cell phone company Nokia from January 1999 to January 2003 can be approximated by R(t) =1.7t^2+ 5t+ 28 billion euros per year (- 1 greater than or equal to t greater than or equal to 3) where t is time in years ( t = 0 represents January 2000 ). Estimate, to the nearest billion, Nokia's total revenue from January 1999 through December 2002. Total revenue ~ 4 billion euros Total revenue ~ 120 billion euros Total revenue ~116 billion euros Total revenue ~ 91 billion euros Total revenue ~ 20 billion euros A magazine currently has 8300 subscribers for its online web version. It is adding members at the rate of R(t) =100e^0.04z subscribers per month. If the proportion of members who remain subscribed s months from now is S(t)=e^-0.06t, how many online subscribers will the magazine have two years from now?

Explanation / Answer

1)revenue R(t)=-1.7t2+5t+28, -1<=t<=3

total revenue =[-1 to 3]-1.7t2+5t+28 dt

total revenue =[-1 to 3] (-1.7/3)t3+(5/2)t2+28t

total revenue =[(-1.7/3)33+(5/2)32+28*3]-[(-1.7/3)(-1)3+(5/2)(-1)2+28(-1)]

total revenue =(-1.7*9)+(5/2)*9 +28*3 -(1.7/3)-(5/2)+28

total revenue =116 billion euroes

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