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fenix001 [56]
3 years ago
6

Which country was the source of most of the illegal drugs, especially cocaine, that were imported into the US during the 1970s a

nd 1980s?
Social Studies
1 answer:
Dahasolnce [82]3 years ago
3 0

Answer:

Mexico

Explanation:

The border of the United States of america and the country of Mexico is and was the main entry point of cocaine into America. This has long been a problem for the country of America.

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,,,use info from the book your studying

,,,make a line side to side and put 4 events on it from oldest to newest using as much info from the book as possible

Explanation:

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The most powerful medieval pope was
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<span>The most powerful medieval pope was Pope Innocent III. He "reigned" for 18 years, during the end of the 12th century until the beginning of the 13th century - 1246 when he died. He was very powerful during this time, and had a strong influence even over kings whose countries practiced Catholicism. which is basically all of Europe. He was also the one who started the Crusades to fight Muslims. </span>
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Why might some mounds have been built to look like animals?
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Answer:

While these mounds take many forms and served different purposes, with each in a sense telling its own story, all were built entirely by hand, usually by piling up earth one basket-full at a time. Some served as burial mounds for the honored dead, while other flat-topped mounds were parts of large cities or towns and held temples or ceremonial buildings, and still others were built in the shape of giant animals.

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Which principles are typically associated with the Republican Party? Select all that apply.
zalisa [80]
C. Progressive ideals. 

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3 0
3 years ago
Suppose you find a rock that contains 10 micrograms of radioactive potassium-40, which has a half-life of 1.25 billion years. By
attashe74 [19]

Answer:

The rock is 3.75 billion years ago.

Explanation:

Given that:

Half life = 1.25 billion years

1 billion years = 10⁹ years

So,

Half life = 1.25 × 10⁹ years

t_{1/2}=\frac {ln\ 2}{k}

Where, k is rate constant

So,  

k=\frac {ln\ 2}{t_{1/2}}

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

The rate constant, k = 5.5452 × 10⁻¹⁰ years⁻¹

Initial amount [A₀] = 80 micrograms

Final amount [A_t] = 10 micrograms

Using integrated rate law for first order kinetics as:

[A_t]=[A_0]e^{-kt}

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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