Answer:
x = 22°
the angles are: 63° and 117°
Step-by-step explanation:
a linear pair of angles total together to be 180°
so:
3x - 3 + 5x + 7 = 180
combune like terms:
8x = 176
divide both sides of the equation by 8:
x = 22°
the angles are: 63° and 117°
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;
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Answer:
14.4 would be the answer hope this is helpful
Step-by-step explanation:
14.4/30= 48%
<h3><u>Write two division expression s that have the same vaule as 36.8 ÷ 2.3
</u></h3>
<em><u>Solution:</u></em>
Given that,
We hve to find the two division expression s that have the same vaule as 36.8 ÷ 2.3
From given,
So, we have to find two division expressions that has a value of 16
<em><u>First division expression</u></em>
We know that 32 divided by 2 gives 16
Thus, we can write as,
<em><u>Second Expression:</u></em>
We know that 48 divided by 3 gives 16
Thus, we can write as,
Thus the two expressions are found
Perpendicular lines is e
Angle is c
Line segment is a
Parallel lines is h
Circles is f
