Posted by **justin** on Saturday, May 4, 2013 at 2:58pm.

The concentration C (in milligrams per milliliter) of a drug in a patient's bloodstream t hours after injection into muscle tissue is modeled by

C =

3t/26 + t^3

Use differentials to approximate the change in the concentration when t changes from

t = 1

to

t = 1.5.

(Round your answer to four decimal places.)

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