You would need too do 5*5=25 if you did 5*7=35 that would be wrong
Answer: 1211.6585 years
<u>Step-by-step explanation:</u>
The equation for exponential growth is: 
- P: final population
- P₀: initial population
- k: rate of decay (or growth)
- t: time
Use the half life information to find k:

Next, input the information (65% decayed = 35% remaining) and the k-value to find your answer.

1.772453850905516027298167...
This isn't a question. What is the question?