Question

1)The concentration of a drug in an organ at any time t (in seconds) is given by

x(t) = 0.08 + 0.18(1 − e^−0.04t)

where x(t) is measured in milligrams per cubic centimeter (mg/cm³).

(a) What is the initial concentration of the drug in the organ?
  mg/cm³

(b) What is the concentration of the drug in the organ after 18 sec? (Round your answer to four decimal places.)
  mg/cm³

2)Jane took 120 mg of a drug in the morning and another 120 mg of the same drug at the same time the following morning. The amount of the drug (in milligrams) in her body t days after the first dose was taken is given by the following.

A(t) =

120e−1.1t	if 0 ≤ t < 1
120 1 + e1.1 e−1.1t	if t ≥ 1

What was the amount of drug in Jane's body immediately after taking the second dose? After 2 days? (Round your answers to one decimal place.)

after the second dose	mg
after 2 days	mg

Answer 1