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son4ous [18]
3 years ago
6

2 points

Mathematics
1 answer:
Yuki888 [10]3 years ago
6 0

Answer:

210 cm2

Step-by-step explanation:

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13. Pick a point and see which formula works.
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14. Use the compound interest formula A = P*(1 +r/n)^(nt).
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15. The lid has a perimeter of 90", so the area of the sides is
.. 90" * 24" = 2160 in^2
The area of the lid is
.. 30" * 15" = 450 in^2

The gray area is (2160 -450) in^2 = 1710 in^2 larger, corresponding to selection C.


16. The only formula that maps (7, -1) to (21, -3) is that of selection D.


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The middle two problems are the only ones that require you to have prior knowledge. The others could be answered simply by seeing if the answers work.
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The popular online game "Among Us" costs $5.00 to install the game on a computer. Players can pay
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The radioactive element​ carbon-14 has a​ half-life of 5750 years. A scientist determined that the bones from a mastodon had los
Gnesinka [82]

The bones at the time they were​ discovered when the radioactive element​ carbon-14 has a​ half-life of total 5750 years are 10062.5-year-old.

<h3>What is half-lives?</h3>

Half lives is the time interval which is need to decay the atomic nuclei of a radioactive sample.

There is a scientist who determined that the bones from a mastodon had lost 70.3​% of their​ carbon-14.  Thus, the fraction remaining is,

f=1-(70.3/100)=1-0.703

f=1-(70.3/100)=0.297

Now the fraction remaining can be given as,

f=(1/2)ⁿ

Here, n is the half life elapsed. Put the value of fraction remaining.

0.297=(1/2)ⁿ

n=1.75

The radioactive element​ carbon-14 has a​ half-life of total 5750 years. Thus,

Years=1.75*5750

Years=10062.5

Thus, the bones at the time they were​ discovered when the radioactive element​ carbon-14 has a​ half-life of total 5750 years are 10062.5-year-old.

Learn more about the half lives here;

brainly.com/question/2320811

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2 years ago
I need help, i cant do this easly i suck at math so was wandering if yall can give me an answer for these or tell me how to do i
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On all of them sorry but if i dont know wich one to do then....
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3 years ago
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The height of a trapezoid is 8in. and its area 96 in. (2nd Power) One base of the trapezoid is 6 inches longer that the other ba
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