See also
brainly.com/question/8975313The decay factor is 1/2.
The change is (1/2 -1)*100% = -50% per period. Negative indicates a decrease of 50% per period.
The ration is 11 to 33
It could also be 11/33
Or it could also be 11:33
Hope this helps! - Alyssa
Answer: 18
Explanation: A square has 4 equal sides so you decide the perimeter of 72 by 4 which is 18