SOLUTION: The radius of a circle has been tripled. How many times greater is the area? A. 9 B. 3 C. 6 D. 1

Algebra ->  Rectangles -> SOLUTION: The radius of a circle has been tripled. How many times greater is the area? A. 9 B. 3 C. 6 D. 1      Log On


   

Question 1054062: The radius of a circle has been tripled. How many times greater is the area?
A. 9
B. 3
C. 6
D. 1
Found 2 solutions by KMST, Alan3354:
Answer by KMST(5328) About Me  (Show Source):
You can put this solution on YOUR website!
9
As you scale up by a factor k ,
areas change by a factor k%5E2 ,
volumes by k%5E3 .
3%5E2=9 .

Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
The radius of a circle has been tripled. How many times greater is the area?
A. 9
B. 3
C. 6
D. 1
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It's 9 times as great.
That's an increase of 800% --> 8 times greater.
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None of the above.