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April 20, 2014

Homework Help: Calculus

Posted by Angel on Thursday, September 22, 2011 at 9:18am.

The number of people who donated to a certain organization between 1975 and 1992 can be modeled by the equation
D(t)=-10.61t^(3)+208.808t^(2)-168.202t+9775.234 donors, where t is the number of years after 1975. Find the inflection point(s) from t=0 through t=17 , if any exist.


a. There are no inflection points from t=0 through t=17 .

b. There is one inflection point at t=6.56.

c. There are inflection points at t=0 and t=17.

d. There is one inflection point at t=0.15.

e. There are inflection points at t=0, t=0.15,and t=17.

I thought it was B.

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