
Algebra PreAlgebra and Basic Algebra Math Forum 
 LinkBack  Thread Tools  Display Modes 
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: 9,764 Thanks: 651  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.


Tags 
changing, formula, subject 
Thread Tools  
Display Modes  

Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
formula for calculating an changing percentage  Leander  Applied Math  0  February 3rd, 2012 02:04 PM 
Changing the subject of a formula  poochie03  Algebra  1  September 10th, 2011 01:10 PM 
How to rearrange the subject of the formula?  maths noob1  Algebra  1  October 4th, 2009 05:30 PM 
Changing the subject of a formula  chuckienz  Linear Algebra  1  May 6th, 2009 06:23 PM 