December 14th, 2012, 04:49 PM  #1 
Member Joined: Dec 2012 Posts: 30 Thanks: 0  Variation
d varies directly with the cube of w and inversely with p; use k as the constant of proportionality. Can anyone help me solve this? 
December 14th, 2012, 04:59 PM  #2 
Member Joined: Dec 2012 Posts: 30 Thanks: 0  Re: Variation
Does anyone know where I would start? What should I do first? 
December 14th, 2012, 05:11 PM  #3 
Senior Member Joined: Jul 2012 From: DFW Area Posts: 626 Thanks: 90 Math Focus: Electrical Engineering Applications  Re: VAriation
I'm not sure what the question is.

December 14th, 2012, 05:13 PM  #4 
Member Joined: Dec 2012 Posts: 30 Thanks: 0  Re: Variation
They are saying write as an equation expressing the relationship d varies directly with the cube of w and inversely with p; use k as the constant of proportionality. 
December 14th, 2012, 05:29 PM  #5 
Senior Member Joined: Jul 2012 From: DFW Area Posts: 626 Thanks: 90 Math Focus: Electrical Engineering Applications  Re: Variation I'm not sure how much you know or don't know, so bear with me if I say things that you are already aware of. First, the 3 superscript on the w means it is cubed and since d varies directly with w cubed, w cubed is in the numerator on the other side of the equals sign. On the other hand, since d varies inversely with p, then p is in the denominator. The constant of proportionality k is assumed to be in the numerator. If you have any questions, please reply. 
December 14th, 2012, 05:38 PM  #6 
Member Joined: Dec 2012 Posts: 30 Thanks: 0  Re: Variation
Ok thank you, very well explained. Are you copying your symbols from another website if you don't mind my asking? 
December 14th, 2012, 05:45 PM  #7 
Senior Member Joined: Jul 2012 From: DFW Area Posts: 626 Thanks: 90 Math Focus: Electrical Engineering Applications  Re: Variation
No, I am using You can quote my replies to see examples. There are also many online guides. 

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