Find the exact area of the region bounded by two concentric circles with radii 10 inches and 6 inches.
a) 16pi
b) 64pi
c) 88pi

- anonymous

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- anonymous

@satellite73

- anonymous

@TheSmartOne

- anonymous

big area minus small earea

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## More answers

- anonymous

\[\pi r^2\] big area is
\[100\pi\]

- anonymous

small area ?

- anonymous

big area minus small area =211 right/

- anonymous

?

- anonymous

i think you are missing that there has to be a \(pi\) in the answer

- anonymous

Wait what?

- anonymous

Oh

- anonymous

\[100\pi-36\pi=?\]

- anonymous

87pi

- anonymous

So the answer is C?

- anonymous

your arithmetic is worse than mine even !!

- anonymous

Really/

- anonymous

\[100-36=?\]

- anonymous

Oh it's 77

- anonymous

lolol

- anonymous

you need a calculator

- anonymous

Sorry. I know it's like 10:30 in the morning, but it takes me awhile to wake up

- anonymous

yeah here too

- anonymous

Really?

- anonymous

http://www.wolframalpha.com/input/?i=100-36

- anonymous

let me know when you get \(64\pi\) ...

- anonymous

is this clear or no? (no is a fine answer, just asking)

- anonymous

Omg I do need a calculator

- anonymous

Ima go get one real quick off google

- anonymous

I used to be good at this

- anonymous

use the link i sent wolfram alpha is great

- anonymous

not that you need a calculator to subtract \(100-36\) but still

- anonymous

Oh okay nevermind then. I done already looked at it

- anonymous

yeash

- anonymous

I just realized that 100-30=70 and 100-36=64 cus 10-6=4

- anonymous

however you like to think about it, yes

- anonymous

Oh and can you help this one kid with his algebra? He's new to the site and he looks like he needs help

- anonymous

sure why not?

- anonymous

who is it?

- anonymous

The same kid you tried to help before. He still doesn't understand what you told him and now he's calling to me for help and I don't necessarily remember how to do this stuff

- anonymous

@satellite73

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