Chemicals in the bloodstream: Rational equations are often used to model chemical concentr...

Chemicals in the bloodstream:

Rational equations are often used to model chemical concentrations in the bloodstream. The percent concentration C of a certain drug H hours after injection into muscle tissue can be modeled by the equation shown (H ≥ 0). Complete the table (round to the nearest tenth of a percent) and answer the following questions.

a. What is the percent concentration of the drug 3 hr after injection?

b. Why is the concentration virtually equal at H = 4 and H = 5?

c. Why does the concentration begin to decrease?

d. How long will it take for the concentration to become less than 10%?