Suppose a particular tissue culture has area A(t) at time t and a potential maximum area M.

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Suppose a particular tissue culture has area A(t) at time t and a potential maximum area M. Based on properties of cell division, it is reasonable to assume that the area A grows at a rate jointly proportional to √A(t) and M − A(t); that is,


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where k is a positive constant.


a. Let R(t) = A'(t) be the rate of tissue growth. Show that R'(t) = 0 when A(t) = M/3.


b. Is the rate of tissue growth greatest or least when A(t) = M/3?


c. Based on the given information and what you discovered in part (a), what can you say about the graph of A(t)?

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Calculus For Business, Economics And The Social And Life Sciences

ISBN: 9780073532387

11th Brief Edition

Authors: Laurence Hoffmann, Gerald Bradley, David Sobecki, Michael Price

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