Can someone please explain how they arrive at the answer? Thanks in advance.
If no treatment has been given within 3 hours after injury to a certain organ, theorgan’s function starts decreasing by 20% each hour. If no treatment has been given with 6 hours after injury, approximately how much function will remain?
Answer
At the end of three hours, the organ still has 100% function.
After 4 hours, it has 80% of that 100%, or (0.8)(1), or 0.8.
After 5 hours, it has 80% of the 80% it had at the end of four hours: (0.8)(.8) equals 64%.
After 6 hours, it has 80% of the 64% it still had after five hours: (0.8)(0.64) equals 0.512.
Can you please explain why 80% is constant after 4 hours not decreasing an additional 20%?
If no treatment has been given within 3 hours after injury to a certain organ, theorgan’s function starts decreasing by 20% each hour. If no treatment has been given with 6 hours after injury, approximately how much function will remain?
Answer
At the end of three hours, the organ still has 100% function.
After 4 hours, it has 80% of that 100%, or (0.8)(1), or 0.8.
After 5 hours, it has 80% of the 80% it had at the end of four hours: (0.8)(.8) equals 64%.
After 6 hours, it has 80% of the 64% it still had after five hours: (0.8)(0.64) equals 0.512.
Can you please explain why 80% is constant after 4 hours not decreasing an additional 20%?