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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
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Re: Changing the subject of a formula

Quote:
 Originally Posted by adamfoley 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?
This would be clearer: V = (4/3)?r^3 or V = 4?r^3 / 3

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 Show Printable Version Email this Page Display Modes Linear Mode Switch to Hybrid Mode Switch to Threaded Mode Similar Threads Thread Thread Starter Forum Replies Last Post Leander Applied Math 0 February 3rd, 2012 01:04 PM poochie03 Algebra 1 September 10th, 2011 01:10 PM maths noob1 Algebra 1 October 4th, 2009 05:30 PM chuckienz Linear Algebra 1 May 6th, 2009 06:23 PM

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