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anonymous
 5 years ago
If the volume of a sphere is 18 cm cubed, what is the radius?
anonymous
 5 years ago
If the volume of a sphere is 18 cm cubed, what is the radius?

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anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0V = 4/3 pi r^3. find r from that.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Volume = 4/3 pi r^3 find r using that formula.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0omg but i need to know the radius.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0And you can find it, just work backwards. Plug in the volume you are given and solve for r.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0the equation for the volume of a sphere is (4*Pi*r)/3 solve for r by moving 3/(4*pi) to the other side of the equation so you get r^3 = (3*18)/(4*pi) simplify

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0if V = 4/3 pi r^3, then multiply both sides by 3/4 3/4V = pi r^3 divide both sides by pi r^3 = (3/4pi) V r = cube root of (3/4 pi) V, substitute V = 18 for your answer. Also, learn manipulation of equations. http://www.chem.tamu.edu/class/fyp/mathrev/mralgeb.html

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0khanacademy.org has good videos demonstrating how to do this.
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