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Degger [83]
3 years ago
7

PLEASE HELP! GIVING BRAINLIEST!

Mathematics
2 answers:
Viktor [21]3 years ago
5 0

Answer:

Look down

Step-by-step explanation:

9. x = 1 or 2  or x < 3

10. x ≤ 6

11. x < 4

12. x ≥ -6

13. x > 15

14. x ≤ -30

15. x < -48

16. x < 1

sesenic [268]3 years ago
4 0

Answer:

Step-by-step explanation:

9=x<3

10=x≥6

11=x>4

12=x≥−5

13=x>15

14=x≤−30

15=x>−48

16=x<1

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crimeas [40]
To solve this, we are going to use the surface are of a sphere formula: A=4 \pi r^2
where
A is the surface area of the sphere 
r is the radius of the sphere 

We know for our problem that A=2122.64 and \pi =3.14, so lets replace those vales in our formula:
A=4 \pi r^2
2122.64=4(3.14)r^2
2122.64=12.56r^2
Now, we just need to solve our equation for r:
\frac{2122.64}{12.56} =r^2
r^2=\frac{2122.64}{12.56}
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r=+or- \sqrt{169}
r=13 or r=13
Since the radius of a sphere cannot be a negative number, r=13.

We can conclude that the radius of a sphere with surface area <span>2,122.64 </span>in^2 is 13 in.
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Irina-Kira [14]

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