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June 20th, 2013, 10:23 PM  #1 
Newbie Joined: May 2012 Posts: 21 Thanks: 0  help me solve this please, I need the steps!!
k = 25 (n/100)^(1/2) =4.5k^(0.5)n^(0.5) anyone can show me the step how to solve for n? I know the answer is n=225, but don't know how to get it. solve for n. 
June 21st, 2013, 12:00 AM  #2 
Senior Member Joined: Jul 2010 From: St. Augustine, FL., U.S.A.'s oldest city Posts: 12,131 Thanks: 440 Math Focus: Calculus/ODEs  Re: help me solve this please, I need the steps!!
We may write the equation as: With we may simplify as follows: Assuming the original radicands are nonnegative, we find: 
June 21st, 2013, 02:57 AM  #3 
Math Team Joined: May 2013 From: The Astral plane Posts: 1,487 Thanks: 555 Math Focus: Wibbly wobbly timeywimey stuff.  Re: help me solve this please, I need the steps!!
I missed that last line about the negatives. I can edit my posts now!! Dan 
June 21st, 2013, 07:27 AM  #4  
Senior Member Joined: Jul 2010 From: St. Augustine, FL., U.S.A.'s oldest city Posts: 12,131 Thanks: 440 Math Focus: Calculus/ODEs  Re: help me solve this please, I need the steps!! Quote:
 
June 21st, 2013, 02:05 PM  #5 
Newbie Joined: May 2012 Posts: 21 Thanks: 0  Re: help me solve this please, I need the steps!!
Thanks guys, the is really helpful, but I have one more question, the only thing I dont get with the steps is step 1, on the part 4.5k^(0.5)n^(0.5) become 4.5sqrt(k/n), can someone explain that particular part for me please? 
June 21st, 2013, 02:25 PM  #6  
Senior Member Joined: Sep 2012 From: British Columbia, Canada Posts: 764 Thanks: 53  Re: help me solve this please, I need the steps!!
Also, you made a mistake going from your second step to your third: Quote:
 
June 21st, 2013, 03:05 PM  #7  
Senior Member Joined: Jul 2010 From: St. Augustine, FL., U.S.A.'s oldest city Posts: 12,131 Thanks: 440 Math Focus: Calculus/ODEs  Re: help me solve this please, I need the steps!! Quote:
 
June 21st, 2013, 03:07 PM  #8  
Senior Member Joined: Jul 2010 From: St. Augustine, FL., U.S.A.'s oldest city Posts: 12,131 Thanks: 440 Math Focus: Calculus/ODEs  Re: help me solve this please, I need the steps!! Quote:
 
June 21st, 2013, 03:12 PM  #9 
Senior Member Joined: Sep 2012 From: British Columbia, Canada Posts: 764 Thanks: 53  Re: help me solve this please, I need the steps!!
I understand how your method works. I'm just addressing a typo you made when you got from to 
June 21st, 2013, 03:15 PM  #10  
Senior Member Joined: Jul 2010 From: St. Augustine, FL., U.S.A.'s oldest city Posts: 12,131 Thanks: 440 Math Focus: Calculus/ODEs  Re: help me solve this please, I need the steps!! Quote:
 

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