Hello! The answer to your question is that the average outdoor cat will live about 13.52 years longer than the average indoor cat.
16.70 - 3.18 = 13.52
Hope this helped! :D
Answer:
120 grams will be left after 180 years.
Step-by-step explanation:
A radioactive half-life refers to the amount of time it takes for half of the original isotope to decay and its given by

where,
= quantity of the substance remaining
= initial quantity of the substance
= time elapsed
= half life of the substance
From the information given we know that:
- The initial quantity is 480 g,
- The half-life is 90 years,
- 180 years is the time elapsed.
And we want to find how much will be left. For this we use the above formula.

120 grams will be left after 180 years.
Each as a fraction 42/100 35/100 18/100 100/100