A medicine in the blood decreases by 10% every hour: A = A0(0.90)^t. After about how many hours is half of it left?

  1. 8.1 hours
  2. 5.0 hours
  3. 6.6 hours
  4. 13.2 hours
Answer

C) 6.6 hours

(0.90)^t = 0.5 Rightarrow t = log 0.5log 0.90 approx 6.6 hours. SLO M-09-A-08 · Application

Mathematics MCQ · More Real Numbers MCQs · Practise