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dezoksy [38]
3 years ago
14

A solid metal cube with an edge length of 9 inches is melted down and reshaped into a sphere. Which of the following is the surf

ace area of the sphere to the nearest tenth of an inch?
A. 90.5 square inches
B. 254.5 square inches
C. 391.7 square inches
A. 574.8 square inches
Mathematics
2 answers:
netineya [11]3 years ago
7 0

Answer:

U6 L6: SA & Volume of Spheres Practice Test

1.  A

2. A

3. B

4. B

5. C

6. B

7. B

8. B

9. A

10. D

Source: https://quizlet.com/289419213/surface-areas-and-volumes-of-spheres-practice-u6-l6-connexus-flash-cards/

MrRa [10]3 years ago
3 0

The solution would be like this for this specific problem:

729 = 4*pi * r^3/3 <span>
Multiply both sides by 3 </span>   <span>2185 = 4*pi*r3</span>   <span>Divide both sides by 4 pi.</span>   <span><span>173.9649681528662 = r3

r = </span>5.58239548</span>   A = 4 pi r^2   <span>A = 4 * 3.14 * 5.582395482</span> <span>
A = 391.7 square inches</span>

 

 

The surface area of the sphere to the nearest tenth of an inch is 391.7 square inches.
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