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neonofarm [45]
3 years ago
6

Why does the biosphere not have distinct boundaries?​

Physics
1 answer:
Alexeev081 [22]3 years ago
7 0

Answer:

living things are found in air, water, and soil.

Explanation:

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A substance has a half-life of 10,000 years and an initial mass of 1,000 grams. How many years will pass before only 250 grams o
solmaris [256]
<h3>♫ - - - - - - - - - - - - - - - ~Hello There!~ - - - - - - - - - - - - - - - ♫</h3>

➷ After 10,000 years the mass will be:

1,000 / 2 = 500

After 20,000 years the mass will be:

500/2 = 250

As you can see, the correct answer would be A. 20,000 years

<h3><u>✽</u></h3>

➶ Hope This Helps You!

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is this it?

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