The ratio between the radii of two sphere is 9.2. What is the radii of their volume?
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Directrix (directrix):
If two solids are similar, the cube of the scale factor of the two solids is equal to the ratio of the volumes.
Directrix (directrix):
>>What is the radii of their volume?
Did you mean to write: What is the ratio of their volumes?
OpenStudy (anonymous):
Yes
Directrix (directrix):
Okay.
Directrix (directrix):
The ratio of the radii is the scale factor. It is given to be 9:2 or 9/2.
Your task is this: What is the cube of (9/2) ?
(9/2)^3 = ?
That will be the ratio of the volumes.
Post what you get, okay? @reymishia
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OpenStudy (anonymous):
27
OpenStudy (anonymous):
And it's giving to me like this 9:2
Directrix (directrix):
No. Try again.
9 * 9 * 9
--------- = ?
2 * 2* 2
Directrix (directrix):
What is 9 times 9 times 9 equal?
OpenStudy (anonymous):
729
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Directrix (directrix):
What is 2 * 2 * 2 =
OpenStudy (anonymous):
8
Directrix (directrix):
The ratio of the volumes is the fraction:
729
----
8
You can also write it as 729 : 8