BUSINESS HIGH SCHOOL

You find a fossil, and through careful study you find that only one-sixteenth of the carbon-14 that it once contained is still remaining in it. Carbon-14 has a half-life of approximately 5700 years. You can conclude that the age of the fossil is about __________.a. 4 × 5700 yr = 22,800 yearsb. 16 × 5700 yr = 91,200 years
c. 1/16 × 5700 yr = 356 years
d. 5 × 5700 yr = 28,500 years

Answers

Answer 1
Answer:

Answer:

The correct answer is:

5×5700 yr = 28,500 years (d)

Explanation:

The half life of an element/atom is the time is takes for that element/atom to decay to half of its original mass/size.

It was found that the carbon-14 atom had decayed until only (1)/(16th) of the original size is still remaining.

Now, let us first find how many half lives are in one-sixteenth, and that is (1)/(2)* (1)/(2)* (1)/(2)* (1)/(2) = (1)/(16). so it means that there are 4 half lives in one-sixteenth, and since one half life takes approximately 5700 years, therefore 4 half lives will take 4×5700 yr = 22, 800 years, but at this point (22,800 years ago)the fossil has already half-life, therefore the additional age is to add the number of years it took to decay that half life. hence the age of fossil is:

22,800 + 5700 = 28, 500 years

Related Questions

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Which of the following is NOT a type of 4 organization in a capitalist system?A. sole proprietorships
B. partnerships
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Answers

The answer is C. Collective

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You have $65 in your savings account at the beginning of a month. The bank pays you2.75% interest on this account each year; interest payments are made each month.
Assuming you make no deposits or withdrawals over the next month, how much
interest will you earn during the month?

Answers

Answer:

$0.15

Explanation:

Interest is calculated using the formula below.

I = P x i x t

where I = interest

P= principal amount.

i=interest rate

t=time

Interest is given as an annual percentage. A 2.75 % interest will translate to 2.75/100 divided by 12 monthly interest. Therefore, the applicable interest rate is 0.00229 %

interest for the month will be

i=$65 x 0.00229 x 1

=$0.14895

=$0.15

For several​ years, a professor at Johns Hopkins University had been using the following grading scheme for his final​ exam: He would give an A to the student with the highest score. The grades of the remaining students were then based on what percentage their scores were of the top​ student's score. In the fall of​ 2012, the students in the class came up with the idea of boycotting the final exam. They stood in the hallway outside the classroom but did not enter the room to take the exam. After waiting for a​ time, the professor cancelled the exam​ and, applying his grading​ scale, gave everyone in the class an A on the exam. An article in the New York Times about this incident​ observes: "This is an amazing game theory​ outcome, and not one that economists would likely​ predict." ​Source: Catherine​ Rampell, "Gaming the​ System," New York Times​, February​ 14, 2013. Game theory indicates the​ students' strategy was unlikely to work because

Answers

Answer:

it is extremely difficult to manage to get a group of individuals towards agreeing to participate and not defect from the strategy.

Explanation:

Game theory is a theory that focuses on understanding exactly why an individual makes certain decisions as well as how they affect others. Based on this theory the student's strategy was unlikely to work because it is extremely difficult to manage to get a group of individuals towards agreeing to participate and not defect from the strategy. Since not everyone would believe that it will work and others may just get tired.

In inflation-adjusted dollars, how have average wages in the united states changed in the last 20 years?

Answers

Wages have stayed the same. 

Based on the position's responsibilities, why do you think you're a good fit for this position?*

Answers

Assuming that i applied as an accountant in a company

I think i'm a good fit for this position because :

- I pay high attention in details,
- I'm exceptionally good with numbers
- I am a very structured and well organized person

All of those characteristic will became a huge asset for the position

Which of the following is a long-term consequence of mining on the Earth?a. erosion
b. an open pit
c. sedimentation
d. all of the above

Answers

Answer;

-All the above

  • erosion
  • an open pit
  • sedimentation

Explanation;

-Surface mining removes ore deposits that are close to the surface, and subsurface mining removes minerals that are deep underground. While mineral use is very important to us, there are also many environmental impacts, such as erosion, air and water pollution, land destruction and harm to mine workers.

-The environmental impact of mining includes erosion, formation of sinkholes, loss of biodiversity, and contamination of soil, groundwater, and surface water by chemicals from mining processes.Besides creating environmental damage, the contamination resulting from leakage of chemicals also affects the health of the local population.
All of the mentioned options: erosion, an open pit, and sedimentation are long-term consequences of mining on the Earth.
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