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Pepsi [2]
3 years ago
11

Is everyone having a good thanksgiving?

Social Studies
1 answer:
horsena [70]3 years ago
4 0
Yes...thanks for asking!
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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
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
Who regulates markets where investments are traded?
Amiraneli [1.4K]
State tax board i think
3 0
3 years ago
Read 2 more answers
What are the advantages and disadvantages of legalising baby bins?
yan [13]
There are ADVANTAGE of legalizing baby bins or baby hatches which are typically used to leave the newborn babies by their parent who do not want them for certain reasons and abandon them there.
This can save many lives of the newborns as the other way people might choose is killing the babies or abandoning them at places where no one might ever find them.
The baby left there will have a positive opportunity to flourish in the society unlike the one left at street as the hatches are monitored by law.

There can be some DISADVANTAGES as well to the scheme as it might help promote immoral behaviors in society. A key factor in stopping immoral activities is the fear of society, and baby bins remove that fear. Another risk can be of an increasing tendency of rapes where people might think its OK to give birth to children and then leave them to baby bins. 
8 0
3 years ago
When is one time a scrum master may be a participant rather than a facilitator
Vesnalui [34]

The  one time a scrum master may be a participant rather than a facilitator is when using ad-hoc teams for inspect and adapt.

<h3>What is the function of scrum master as a facilitator?</h3>

As a scrum master, he can serves as a facilitator to makes an action of learning process to be easy or easier.

But in some cases, whereby, there is a need of using ad-hoc teams for inspect and adapt, he can be a participant.

Learn more about  facilitator at:brainly.com/question/25759088

#SPJ12

5 0
1 year ago
Which program is an example of socialized medicine?
julsineya [31]

Answer: the correct answer is The United States’ Veterans Health Administration.

Explanation:  in a socialized medicine system, the government owns and runs the system. It employs the doctors, nurses, and other staff, and it owns and runs the hospitals.

6 0
3 years ago
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