anonymous
  • anonymous
Can someone help me?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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anonymous
  • anonymous
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is3535
  • is3535
i can t see the link a you copy and past and post
anonymous
  • anonymous
Ok, one sec.

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anonymous
  • anonymous
A cone has a diameter of 16 in. and a slant height of 17 in. What is the approximate volume of the cone? Use 3.14 to approximate the value of straight pi. Round your answer to the nearest tenth, if necessary. (Hint: V =1/3 pi r squared h A. 1004.8 in3 B. 1138.8 in3 C. 1259.3 in3 D. 4019.2 in3
is3535
  • is3535
i think it D
anonymous
  • anonymous
@cvliboi Can you help me on this?
hartnn
  • hartnn
diameter = 16 so what will be radius = r = .. ?
anonymous
  • anonymous
Wouldn't I just have to divide 16 by two? Wouldn't the radius be 8?
hartnn
  • hartnn
yesss r= 8 h =17 you have the formula, just plug the values in!
hartnn
  • hartnn
just a sec, its slant height l = 17 we need to find the value of 'h' using pythagoras theorem first :)
hartnn
  • hartnn
|dw:1432752080994:dw| do you know pythagoras theorem ?
anonymous
  • anonymous
Yeah
hartnn
  • hartnn
so can you tell me the value of h ?
anonymous
  • anonymous
I'm confused. If we're talking about the Pythagoras Theorem, shouldn't I so 17*17 and 8*8? If so, then 17*17=289 and 8*8=64 and then added together it would be 353...
hartnn
  • hartnn
the hypotenuse is 17 :) so 17^2 = 8^2 + h^2 so to get h^2, you'll infact subtract those 2 values, not add them
anonymous
  • anonymous
Oh, so then it would be 289-64=225?
hartnn
  • hartnn
thats right :) h^2 = 225 so h= .. ?
anonymous
  • anonymous
50625
anonymous
  • anonymous
Wait...I don't think I did that right..
hartnn
  • hartnn
h = 225 h = sqrt 225 = ... ?
anonymous
  • anonymous
15
hartnn
  • hartnn
correct! h = 15 r = 8 just plug these in the formula given :)
anonymous
  • anonymous
Ohh, I get it now. Thank you so much for your help :)
hartnn
  • hartnn
you're welcome ^_^

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