anonymous
  • anonymous
A regular decagonal prism has a volume of 2.5. If each one of its edges is doubled in size, what would be its new volume?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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anonymous
  • anonymous
do you know the equation for the volume of a decagon?
anonymous
  • anonymous
No
anonymous
  • anonymous
V = (5 eh / 2)cot(18) where e is the edge length of the base and h is the height of the prism

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anonymous
  • anonymous
so if each one if its edge lengths were doubled then we get V =(5*2eh /2)cot(18)
anonymous
  • anonymous
but how can I solve it using what they gave me?
anonymous
  • anonymous
which is equal to (10eh/2)cot(18)
anonymous
  • anonymous
sorry I'm really bad at math :/
anonymous
  • anonymous
the volume will double
anonymous
  • anonymous
ok, so I double the 2.5
anonymous
  • anonymous
yep
anonymous
  • anonymous
Ok I think I got it, thank you so much!! :D
anonymous
  • anonymous
i'm not sure if its the correct though :X
anonymous
  • anonymous
It's ok at at least I get it now because I sure didn't have any idea on how to solve it so thank you!

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