Respuesta :

rogirl268

Answer:

Khan Academy.

Step-by-step explanation:

You can go on khan academy and search up "percentages and numbers." The videos should immediately pop up. there are also lessons if you don't want to risk getting your problem wrong. If you are still confused and do not understand please just comment and I will respond.

uhssma
ANSWER: 643.7


We have to find the areas of both circles, and subtract the area of the smaller one from the bigger one. That will be the answer.

Area of a circle = pi times radius^2



So


Small circle:
A = 3.14 x 18 x 18
A = 1,017.36


Bigger circle:
A = 3.14 x 23 x 23
A = 1,661.06


So then we do:

1,661.06 - 1,017.36 which equals 643.7. That’s the area of the ring.

I hope this helped! (:

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