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For this problem, we use the formula for radioactive decay which is expressed as follows:
An = Aoe^-kt
where An is the amount left after time t, Ao is the initial amount and k is a constant.
We calculate as follows:
at hal-life equal to 5700,
An = Aoe^-kt
0.5 = e^-k(5700)
k = 1.22x10^-4
An = A
Answer:
A wetland is an ecosystem in which water either covers the soil or is present at or near the surface for at least part of the year. Water may flow through freshwater wetlands or stay in place. Wetlands are often nutrient-rich, highly productive, and serve as breeding grounds for many organisms.
Explanation:
Answer:
all the digestive activities of life (respiration , digestion, excretion, etc) occur at the cellular level.
Explanation:
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