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Mathematics 15 Online
OpenStudy (anonymous):

word problem: The concentration of a certain drug in the bloodstream t minutes after swallowing a pill containing the drug can be approximated using the equation C(t)=.5(2t+1)^-1/2, where C(t) is the concentration in arbitrary units and t is in minutes. Find the rate of change of concentration with respect to time at t=4minutes.

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