TeenHelp
Support Forums Today's Posts


Get Advice Connect with TeenHelp Resources
HelpLINK Facebook     Twitter     Tumblr Hotlines

You are not registered or have not logged in

Hello guest! (Not a guest? Log in above!)

As a guest on TeenHelp you are only able to use some of our site's features. By registering an account you will be able to enjoy unlimited access to our site, and will be able to:

Signing up is free, anonymous and will only take a few moments, so click here to register now!



Education and Careers Work of any kind can get stressful at times. Ask in this forum if you need help with coursework, applications, and more.

Closed Thread
 
Thread Tools Search this Thread
  (#1 (permalink)) Old
Zero. Offline
Meeeeeeeeewrth!
Not a n00b
**
 
Zero.'s Avatar
 
Age: 17
Gender: Female
Location: Your basement.

Posts: 92
Join Date: November 25th 2011

Oh a math question...? - April 28th 2012, 11:12 AM

*awkward look* urmmmm can anyone help me with this math question?

Whats the percentage increase in the area of the circle if the radius of the circle is increased by a)10%
b)50%
c) 100%

I've tried other sites but they keep giving different answers! argh!
I got:

a) 21%
B) 125%
c)1000%

the answer for c sounds CRAZYYYYYYYYYY
   
  (#2 (permalink)) Old
Music Offline
Thoroughly medicated
I've been here a while
********
 
Music's Avatar
 
Name: Richard
Age: 24
Gender: Male
Location: Alberta, Canada

Posts: 1,583
Join Date: January 6th 2009

Re: Oh a math question...? - April 28th 2012, 05:01 PM

The easiest way to do this is to choose a base circle for all your math. Let's say your base circle has a radius of 10 and an area of 314

A 10% increase in radius is going to make it 11. 11x11x3.14=380
To get % you can do ((380-314)/314)x100 which shows that this is a 21% increase

A 50% increase in radius makes it 15. 15x15x3.14=706.5
((706.5-314)/314)x100=125
So the answer to b is 125%

A 100% increase in radius makes it 20. 20x20x3.14=1256
((1256-314)/314)x100=300
So the answer to c is 300%

You really shouldn't look for answers on the internet, you don't learn the lesson intended which means you may as well not do it. When you don't know how to do something your best bet is to ask your teacher or another person in your class.


Member since 2005

Last edited by Music; April 28th 2012 at 05:11 PM.
  Send a message via MSN to Music  
Closed Thread

Bookmarks

Tags
math, question

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off





All material copyright 1998-2014, TeenHelp.
Terms | Legal | Privacy | Conduct

Powered by vBulletin®.
Copyright ©2000-2014, Jelsoft Enterprises Ltd.
Search engine optimization by vBSEO.
Theme developed in association with vBStyles.