a. At initially 60 milligrams of the drug administered to the patient
b. After 3 hours, 38.257 milligrams of the drug is administered to the patient
the patient's bloodstream after t hours is given by,
[tex]D(t) = 60ex^{-0.15t}[/tex]
At initially, t = 0
[tex]D(0) = 60e^{-0.15(0)}\\=60 milligrams[/tex]
After 3 hours, substitute t = 3
[tex]D(3) = 60e^{-0.15(3)}\\\\= 60e^{-0.45}\\\\=38.257 milligrms[/tex]
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