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March 23rd, 2013, 08:27 AM  #1 
Newbie Joined: Mar 2013 Posts: 10 Thanks: 0  Changing the subject of a formula
Find r when V = 4/3?r^3 Next I have multiplied by 3 giving 3V = 4?r^3 Then divide by 4? giving r^3 = 3V/4? Here is where I am not sure, do I cube root both sides? Like r = cube root 3v/4? Thanks in advance. 
March 23rd, 2013, 09:11 AM  #2  
Math Team Joined: Oct 2011 From: Ottawa Ontario, Canada Posts: 14,597 Thanks: 1039  Re: Changing the subject of a formula Quote:
Apart from that, all's fine; good stuff! Show this way: r = [3v / (4?)]^(1/3)  
March 23rd, 2013, 02:05 PM  #3 
Newbie Joined: Mar 2013 Posts: 10 Thanks: 0  Re: Changing the subject of a formula
Thanks for the reply Denis, that clears things up.


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