Question

Urgent Help

Answer 1

@welshfella

Answer 2

@skullpatrol

Answer 3

@Michele_Laino

Answer 4

we have to compute this difference:
area of the bigger circle - area of the smaller circle

Answer 5

namely:
\[\Large Area=\pi {11^2} - \pi {8^2} = \pi \left( {121 - 64} \right) = ...?\]

Answer 6

I got this:
\(121-64=57\)

Answer 7

so, the area is?

Answer 8

Sorry, yes. 57pi

Answer 9

that's right!