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anonymous
 5 years ago
The area of a circular ring is 90. If the radius is 10, what is the radius of the inner circle of the ring. (Assume the circles forming the ring have the same center.)
anonymous
 5 years ago
The area of a circular ring is 90. If the radius is 10, what is the radius of the inner circle of the ring. (Assume the circles forming the ring have the same center.)

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anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0dw:1326924368144:dw

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0the picture wasnt given by the way... i drew it myself

phi
 5 years ago
Best ResponseYou've already chosen the best response.1the ring (dashed lines) has area 90. The big circle has area pi*10*10= 100 pi Subtract the ring from the big circle to get the area of the smaller circle. now you know A_small_circle= pi * r^2 so 100 pi  90 = pi r^2 can you solve for r?

Hero
 5 years ago
Best ResponseYou've already chosen the best response.1Yes, this is not as hard as you think.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0yeah, i know. i dont seem to be getting the right answer though.

Hero
 5 years ago
Best ResponseYou've already chosen the best response.1First of all, are you sure you wrote everything down correctly? You were not exactly clear in your original post. You need to state which area of which circle the 90 applies to. You also need to state which radius the 10 applies to.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0ok i made one mistake

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0let me retype the question

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0The area of a circular ring is 90. If the radius of the outer circle forming the ring is 10, what is the radius of the inner circle of the ring? (Assume the circles forming the ring have the same center.)

Hero
 5 years ago
Best ResponseYou've already chosen the best response.1Which circular ring is 90? The big one or little one?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0the prob doesnt say but i am assuming its the while circle (little one included)

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0dw:1326927820335:dw

Hero
 5 years ago
Best ResponseYou've already chosen the best response.1Why would they give you the area of the big one and then give you the radius of the big one. One of those are in conflict, and I'll prove it to you

Hero
 5 years ago
Best ResponseYou've already chosen the best response.1A = pir^2 90 = pir^2 90/pi = r^2 sqrt(90/pi) = r see if you get r = 10 from that. I doubt it

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0thats why im confusded.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0but thats the problem.

Hero
 5 years ago
Best ResponseYou've already chosen the best response.1Well, if it's that bad, don't do the problem.

Hero
 5 years ago
Best ResponseYou've already chosen the best response.1Is this problem on your computer or in your book?

Hero
 5 years ago
Best ResponseYou've already chosen the best response.1Nope didn't work. Why do you go to the site and copy screen and save as picture file, then upload here.

Hero
 5 years ago
Best ResponseYou've already chosen the best response.1I just told you. There should be a "print screen" function on your keyboard. Go to the site and press that. Alternatively find a copy screen program online

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0hold on. im gonna use excel 2010.

Hero
 5 years ago
Best ResponseYou've already chosen the best response.1Excel? What's that gonna do?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0excel has a screenshot option

Hero
 5 years ago
Best ResponseYou've already chosen the best response.1r = 8.45 The problem it didn't say whether to use 3.14 for pi or not. By the way, you imagined the area incorrectly initally.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0show me how u got that please

Hero
 5 years ago
Best ResponseYou've already chosen the best response.1Funny, everyone knows what twiddla is, but no one knows what vyew is

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Hero I need help putting in a prob into my hw site... its the latest one i posted
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