Answer:
1 is 13
2 is 13
3 is -7
4 is 7
Step-by-step explanation:
Answer the answer would be 6
Step-by-step explanation:
Using an exponential function, it is found that it takes 18.6 days for 80% of the material to decay.
The amount of a substance after t days is modeled by:

In which:
- k is the decay rate, as a decimal.
- A(0) is the initial amount.
The half-life is of 8 days, hence
, and this is used to find k.







Hence:

The time it takes for 80% of the material to decay it t for which
, hence:






It takes 18.6 days for 80% of the material to decay.
To learn more about exponential functions, you can take a look at brainly.com/question/24906920
1.06
1.501
1.506
1.605
Hope this helps
Answer:
(n+6)(n-6)
Step-by-step explanation: