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liq [111]
3 years ago
7

Pyramid is best described as what

Social Studies
1 answer:
kifflom [539]3 years ago
7 0

Answer: A pyramid is a structure whose outer surfaces are triangular and converge to a single step at the top, making the shape roughly a pyramid in the geometric sense.

Explanation: Me big brains

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A parent who scores higher on the kidi would be most likely to provide responsive baby care, as well as be least depressed.

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Suppose you find a rock that contains 10 micrograms of radioactive potassium-40, which has a half-life of 1.25 billion years. By
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The rock is 3.75 billion years ago.

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k=\frac {ln\ 2}{1.25\times 10^9}\ year^{-1}

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Using integrated rate law for first order kinetics as:

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So,  

10=80\times e^{-5.5452\times 10^{-10}\times t}

80e^{-5.5452\times \:10^{-10}x}=10

\frac{80e^{-5.5452\times \:10^{-10}x}}{80}=\frac{10}{80}

\ln \left(e^{-5.5452\times \:10^{-10}x}\right)=\ln \left(\frac{1}{8}\right)

x=\frac{10^{10}\times \:3\ln \left(2\right)}{5.5452}=3.75\times 10^9

So,

<u>The rock is 3.75 billion years ago.</u>

8 0
3 years ago
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Answer:

The Han Dynasty

Explanation:

hope this helped!

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