generic image
Processing...
  • Games
  • Catalog
  • Develop
  • Robux
  • Search in Players
  • Search in Games
  • Search in Catalog
  • Search in Groups
  • Search in Library
  • Log In
  • Sign Up
  • Games
  • Catalog
  • Develop
  • Robux
   
ROBLOX Forum » Club Houses » Off Topic
Home Search
 

Re: help with math homework por favor

Previous Thread :: Next Thread 
xRainingSlayerx is not online. xRainingSlayerx
Joined: 17 Apr 2011
Total Posts: 15986
14 Sep 2012 12:21 AM
i actually don't get this one

A circle has a radius of 9 inches. The radius is multiplied by 2/3 to form a second circle. How is the ratio of the areas related to the ratio of the radii?

thx
Report Abuse
crazymadwoIf is not online. crazymadwoIf
Joined: 25 Aug 2012
Total Posts: 278
14 Sep 2012 12:24 AM
im in pre-cal honors
Report Abuse
xRainingSlayerx is not online. xRainingSlayerx
Joined: 17 Apr 2011
Total Posts: 15986
14 Sep 2012 12:26 AM
ahhhh then help me
Report Abuse
dc131 is not online. dc131
Joined: 16 Oct 2008
Total Posts: 19334
14 Sep 2012 12:26 AM
[ Content Deleted ]
Report Abuse
xRainingSlayerx is not online. xRainingSlayerx
Joined: 17 Apr 2011
Total Posts: 15986
14 Sep 2012 12:28 AM
EXACTLY
Report Abuse
DaneAnator is not online. DaneAnator
Joined: 25 Aug 2010
Total Posts: 381
14 Sep 2012 12:29 AM
v=KmIyzwVKTN8
Report Abuse
betteranimationguy is not online. betteranimationguy
Joined: 22 Jun 2010
Total Posts: 412
14 Sep 2012 01:02 AM
i'll let r_0 be the old radius and r_1 be the new radius.

r_0 = r_0
r_1 = (2/3)r_0

the ratio of the areas is A_1 / A_0 = (pi*r_1^2) / (pi*r_0^2)

the pi's cancel and the ratio can be rewritten as

A_1 / A_0 = (r_1 / r_0)^2, replace r_1 with (2/3)r_0 to get

A_1 / A_0 = ((2/3)r_0 / r_0)^2, now the r_0's cancel

A_1 / A_0 = (2/3)^2... this means the ratio of the areas has nothing to do with what the original radius was.

A_1 / A_0 = 4/9
:)
Report Abuse
archangel1236 is not online. archangel1236
Joined: 08 Sep 2012
Total Posts: 93
14 Sep 2012 01:47 AM
Why ask us OTers? We might give you the wrong answers.
Report Abuse
betteranimationguy is not online. betteranimationguy
Joined: 22 Jun 2010
Total Posts: 412
14 Sep 2012 10:36 PM
No I gave the right answer
Report Abuse
belowzero55 is not online. belowzero55
Joined: 25 Jul 2011
Total Posts: 3445
14 Sep 2012 10:37 PM
Ohi

~Bёlошzёґо55~
Report Abuse
Previous Thread :: Next Thread 
Page 1 of 1
 
 
ROBLOX Forum » Club Houses » Off Topic
   
 
   
  • About Us
  • Jobs
  • Blog
  • Parents
  • Help
  • Terms
  • Privacy

©2017 Roblox Corporation. Roblox, the Roblox logo, Robux, Bloxy, and Powering Imagination are among our registered and unregistered trademarks in the U.S. and other countries.



Progress
Starting Roblox...
Connecting to Players...
R R

Roblox is now loading. Get ready to play!

R R

You're moments away from getting into the game!

Click here for help

Check Remember my choice and click Launch Application in the dialog box above to join games faster in the future!

Gameplay sponsored by:
Loading 0% - Starting game...
Get more with Builders Club! Join Builders Club
Choose Your Avatar
I have an account
generic image