Solve the 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 
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 = 8 minutes.
Definitions:
Assembly Method
A process in manufacturing where parts are put together to make a final product.
Marginal-Utility-To-Price Ratio
The comparison of the additional satisfaction obtained from consuming one more unit of a good to its cost.
Marginal Utility
The incremental pleasure or value received from consuming one more unit of a good or service.
Marginal Utility Schedules
Tables or graphs that show the relationship between the quantity of a good consumed and the utility (satisfaction) that is gained from each additional unit.
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