Math Is Fun Forum
  Discussion about math, puzzles, games and fun.   Useful symbols: √ ∞ ≠ ≤ ≥ ≈ ⇒ ∈ Δ θ ∴ ∑ ∫ π -

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#1 2006-04-22 00:32:29

dadon
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proof question.

Hey guys,

Needed some help on 2 proof questions:

1) Prove that the centre of mass of a uniform wire in the form of a semi-circle of radius r is at a distance 2r/pie (sorry don't know how to insert symbol) from the centre.

2) Prove that the centre of mass of a uniform semi-circular laminar of radius r is at a distance 4r/3pie from the centre.

I hope you guys can help. Thanks

kind regards,

dadon

#2 2006-04-22 01:16:11

pgonzales
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Re: proof question.

In a FY 2/03 budget, directed projects amount per contract were $250,000.  In Fy 03/04, this amount increased to $287,500.  What is the amount of the increase?

#3 2006-04-22 01:31:02

ganesh
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Re: proof question.

pgonzales,
the amount of increase in percentage is


Character is who you are when no one is looking.

#4 2006-04-23 05:17:27

dadon
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Re: proof question.

lol stole my thread!

#5 2006-04-25 02:18:16

dadon
Member

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Re: proof question.

dunno Still having promblem with the proof questions! I would be greatly if someone can help

Kind Regards,

dadon

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