The concentration of anabolic steroids in urine behaves as an exponential decay. For a specific urine sample, the best-fit exponential function is R = (0.6 mg/L)(0.43)t where R is the concentration after t days.
a) What is the initial concentration of steroids?
b) What is the percent rate of decrease in concentration?
c) After 2 days, what is the concentration of steroids?
d) A test exists that can measure the concentration of steroids as low as 0.005 mg/L. How many days after the steroids are taken will it be before the test will not be able to detect the steroid concentration?