Immediately following an injection, the concentration of a drug in the bloodstream is 500 milligrams per milliliter. After t hours, the concentration is 75% of the level of the previous hour. (a) Find a model for C(t), the concentration of the drug after t hours. C(t) =     (b) Determine the concentration of the drug after 8 hours. (Round your answer to the nearest whole number.) milligrams per milliliter

Intermediate Algebra
10th Edition
ISBN:9781285195728
Author:Jerome E. Kaufmann, Karen L. Schwitters
Publisher:Jerome E. Kaufmann, Karen L. Schwitters
Chapter11: Exponential And Logarithmic Functions
Section11.CT: Test
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Immediately following an injection, the concentration of a drug in the bloodstream is 500 milligrams per milliliter. After t hours, the concentration is 75% of the level of the previous hour.

(a) Find a model for
C(t),
the concentration of the drug after t hours.
C(t) =
 
 


(b) Determine the concentration of the drug after 8 hours. (Round your answer to the nearest whole number.)
milligrams per milliliter
 
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