Graph the Function C(f)= 251e^-0.1t-129e^-2.7t

Question

The function C(f)= 251e^-0.1t-129e^-2.7t measures the concentration of a drug in a patient's bloodstream after t hours. The drug is effective only if the concentration is above 180 mg/mL. Graph the function C(t) and determine the time frame when the drug remains effective. (answer in interval notation)

Answer 1

It is about 0.256 < x < 3.324 or 

in interval notation (0.256, 3.324)

 

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