I wrote the solutions. Take docx or pdf file, they are the same. Ask if something is unclear.
1. What is the concentration of the drug in the bloodstream at t = 8 hours?
To find the answer, we draw a vertical line that goes through the point (8, 0) at the x-axis (shown in
green). It has only one intersection with the graph. Draw a horizontal line through this point of
intersection (red) and read the value at the y-axis. In this case it i...