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ASHA 777 [7]
3 years ago
10

30 POINTS PLZ PLZ PLZ HELP !!!!!!!!

Geography
2 answers:
valentinak56 [21]3 years ago
8 0

Answer:

1.  A) system of government in which people hold power

2. B) in a democracy, people vote directly on laws, but in a republic, people elect representitives who make laws.

3. C) United States

4. B) Decision makers are elected by the citizens

5. A) in a democracy, people have a say in government,while in dictatorship they do not.

6.

7. B) North Korea

8.  

9. C) religious leader

10. B) Iran

Hitman42 [59]3 years ago
4 0
1. A, 2. Is B or C, 3.C, 4.B, 5.A, 6.C, 7.A- thats all i know
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Why did france britain and italy agree to give the sudeten territory to germany?
Bogdan [553]
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Which is an equation of the line with slope -4 and a y-intercept 7
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Calculate the amount, in grams, of an original 300-gram sample of radioactive isotope Potassium-40 remaining after
Aleksandr [31]

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 (m (t)), in grams, is described below:

m(t) = m_{o}\cdot e^{-\frac{t}{\tau} } (1)

Where:

m_{o} - Initial mass, in grams.

t - Time, in years.

\tau - Time constant, in years.

The time constant can be found from half life (t_{1/2}), in years, described in statement:

\tau = \frac{t_{1/2}}{\ln 2} (2)

If we know that m_{o} = 300\,g, t = 3.9\times 10^{9}\,yr and t_{1/2} = 1.3\times 10^{9}\,yr, then the current amount of the sample is:

\tau = \frac{1.3\times 10^{9}\,yr}{\ln 2}

\tau \approx 1.876\times 10^{9}\,yr

m = (300\,g)\cdot e^{-\frac{3.9\times 10^{9}\,yr}{1.876\times 10^{9}\,yr} }

m\approx  37.521\,g

The current amount of the Potassium-40 sample is approximately 37.521 grams.

4 0
3 years ago
How much the Atlantic Ocean has grown since you were born (2000)?
miss Akunina [59]
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So,

1. Since 2000, it grows about (2018-2000) x 2.5 = 45cm
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3. 200 x 2.5 = 500 cm
4. The <span> Atlantic begin forming since mesozoic era</span>
7 0
3 years ago
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