Answer:
The current amount of the Potassium-40 sample is approximately 37.521 grams.
Explanation:
The amount of the sample of the radioactive isotope decays exponentially in time, the amount of mass of the sample as a function of time (
), in grams, is described below:
(1)
Where:
- Initial mass, in grams.
- Time, in years.
- Time constant, in years.
The time constant can be found from half life (
), in years, described in statement:
(2)
If we know that 
, 
and 
, then the current amount of the sample is:
The current amount of the Potassium-40 sample is approximately 37.521 grams.
The answer is D! Hope that helped
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Explanation:
The rainforests typically have high biodiversity i.e it has large covers of flora and fauna.
The tropical rainforests are considered to be the oldest biome on earth and that is why they have high biodiversity also there fact is the geographical area of these rainforests are pretty enormous and widespread across the globe.
the tropical rainforests provides equitable climate i.e good amount of rainfall and warm temperature which is a optimum conditions for plants and animal species to survive and also features the best conditions for regular food supplies and growth in natural biodiversity.
many different sources of food and types of shelters are also available in the tropical rainforest, fulfilling the conditions for a vast varieties in natural biodiversity. another important factor that the situations arises in this areas makes way for the new species such as natural disturbance and presence of mountain regions makes home for the refugee species to survive and live.
so these are the reasons why rainforests are typically so biodiversed.
plants and animals ecology in the rainforest has not been in the perfect condition which use to be some decades back it is worsening with time and is a matter of concern.
Tropical rainforests loss is a major environment concern today as because of global climate change has caused major deforestation in the tropical areas. people's influence on the rainforest is also a big problem to watch for.they have started clearing these huge forest cover for wood for furniture and for agriculture and cattle grazing. apart from these issues extinction of species due to global warming has also taken place.
Increase in green house gases and change in natural water cycle have started effecting the natural environment of these rainforests and so tropical rainforests today is big environment concern, as plants and animal's ecology has been disturbed.and losing of natural habitat.
D. Appalachia would be the poorest
