

07012009, 11:41 AM

#11

Daemon Poster
Join Date: May 2009
Posts: 1,037

Re: Math Equation for you all
The problem reminds me of the calculus problem "What is the volume of a drum laying on it's side with contents measuring 8 inches at the deepest point.
My answer: Stand the drum upright, radius squared time pi times the measured depth of the contents.
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07012009, 11:47 AM

#12

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Join Date: Oct 2008
Location: USA
Posts: 2,404

Re: Math Equation for you all
Quote:
Originally Posted by Russel
The problem reminds me of the calculus problem "What is the volume of a drum laying on it's side with contents measuring 8 inches at the deepest point.
My answer: Stand the drum upright, radius squared time pi times the measured depth of the contents.

I'm sorry but that is the wrong answer.
The correct answer is, it's a trick question. The contents falls out
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07012009, 02:46 PM

#13

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Join Date: Jan 2008
Location: U.S.
Posts: 7,841

Re: Math Equation for you all
RuberChicken has the best method. Graph the equation of a circle with a radius of 294 units. The find the same tangent you know in real life using the derivative at point C (the point you know in real life). Using this number you should now be able to graph a line to represent the tangent. Then go to the table on your calculator and subtract the Y values of the point on the circle from the point on the tangent line.
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07012009, 03:01 PM

#14

Daemon Poster
Join Date: May 2009
Posts: 1,037

Re: Math Equation for you all
Quote:
Originally Posted by vampist
I'm sorry but that is the wrong answer.
The correct answer is, it's a trick question. The contents falls out

The other answer to what is the volume of the contents of a drum laying on its side with liquid 8" at the deepest:
55 gallons. The contents are partly air and partly liquid
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07012009, 03:19 PM

#15

Golden Master
Join Date: May 2006
Posts: 7,904

Re: Math Equation for you all
If I graph the circle with center, (0,294), and then graph, "y=4, y=8, y=12... y=80" I can just find the intersections of the lines and the circle, and that will be the lengths correct?
What is the equation of a circle again in Y= form?... (xh)^2 + (yk)^2 = r^2
So... x^2 + (y + 294)^2 = 294^2
x^2 + y^2 + 588y + 86436 = 86436
 86436 86436

x^2 + y^2 + 588y = 0
Anyone want to help me from here? I know... basic algebra 2, but I'm not sure if I am doing right so far....
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07012009, 05:48 PM

#16

Daemon Poster
Join Date: May 2009
Posts: 1,012

Re: Math Equation for you all
Quote:
Originally Posted by superman22x
If I graph the circle with center, (0,294), and then graph, "y=4, y=8, y=12... y=80" I can just find the intersections of the lines and the circle, and that will be the lengths correct?
What is the equation of a circle again in Y= form?... (xh)^2 + (yk)^2 = r^2
So... x^2 + (y + 294)^2 = 294^2
x^2 + y^2 + 588y + 86436 = 86436
 86436 86436

x^2 + y^2 + 588y = 0
Anyone want to help me from here? I know... basic algebra 2, but I'm not sure if I am doing right so far....

Ummmm... *Was murdered by your equation*
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07012009, 06:28 PM

#17

Guru
Join Date: Jan 2008
Location: U.S.
Posts: 7,841

Re: Math Equation for you all
Quote:
Originally Posted by superman22x
If I graph the circle with center, (0,294), and then graph, "y=4, y=8, y=12... y=80" I can just find the intersections of the lines and the circle, and that will be the lengths correct?
What is the equation of a circle again in Y= form?... (xh)^2 + (yk)^2 = r^2
So... x^2 + (y + 294)^2 = 294^2
x^2 + y^2 + 588y + 86436 = 86436
 86436 86436

x^2 + y^2 + 588y = 0
Anyone want to help me from here? I know... basic algebra 2, but I'm not sure if I am doing right so far....

Graph the circle with center (0,0). Then find the equation of the tangent line you mentioned. Use the vertical lines and find intersections with the circles and the tangent line. Compare the y values of corresponding x values at the intersections on every x = 4. This should be the length you're looking for.
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07012009, 07:07 PM

#18

Golden Master
Join Date: May 2006
Posts: 7,904

Re: Math Equation for you all
What is the equation for the graph of the circle though?...
If I graph it with center (0,+294) the tangent line is the Xaxis.
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07012009, 07:23 PM

#19

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Join Date: Apr 2009
Posts: 3,762

Re: Math Equation for you all
*sigh* The things people will do for some rep points. Unless the equation contains MHz, There probably isn't much I can do for you.
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07012009, 07:41 PM

#20

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Join Date: Jan 2008
Location: U.S.
Posts: 7,841

Re: Math Equation for you all
Quote:
Originally Posted by Grantofhell
*sigh* The things people will do for some rep points. Unless the equation contains MHz, There probably isn't much I can do for you.

Is this toward me? I've always helped Superman with math bro...
~~
Equation of the circle: SqRoot(294^2  x^2)
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