Posted by olivia on Thursday, December 11, 2008 at 9:53pm.
find the area of this ring to the nearest square unit. Show your work.
The image shows a ring, the inside raius is 2.0m, and the outside radius is 3.2m. The area of the ring is...
plz help!! thx.

math  Ms. Sue, Thursday, December 11, 2008 at 10:08pm
First, let's get the outside area.
A = pi * r^2
A = 3.14 * 10.24
A = 32.1536
Now, the inside area:
A = 3.14 * 2^2
A = 12.56
Subtract:
32.1536  12.56 = ? 
math  olivia, Thursday, December 11, 2008 at 10:08pm
wow. ur really good! =) thank you!

math  Ms. Sue, Thursday, December 11, 2008 at 10:10pm
You're welcome. :)

math  NachoMath, Thursday, April 21, 2016 at 9:46pm
Combine like terms, in this case simplify to multiply:
3.2^2pi its 10.24pi
2^2pi its 4pi
then subtract like terms
(10.24  4) pi = 6.24pi
~19.59SqU (Square Units)