Question

A blood test is able yo detect the presence of the drug if there is at least 0.1 mg in your blood. How many days will it take before the test will come back negative? Explain your answer.

Answer 1

$\begin{gathered} 68\to7 \\ 72\to5.25 \\ 76\to3.9375 \\ 80\to2.953125 \\ 84\to2.21484375 \\ 88\to1.661132813 \\ 92\to1.245849609 \\ 96\to0.934387207 \\ 100\to0.7007904053 \\ 104\to0.5255928039 \\ 108\to0.394194603 \\ 112\to0.2956459522 \\ 116\to0.2217344642 \\ 120\to0.1663008481 \\ 124\to0.1247256361 \\ 128\to0.09354422707 \\ \\ I\text{t would take 128 hours, which is 5 days and 8 hours} \end{gathered}$