Question

What is the EXACT area of the circle having a radius of 11 miles?

Answer 1

A = 380.13

Answer 2

^^ Not exactly exact.
A = pi*radius^2

Answer 3

Right...so the EXACT area (since pi is not exact!) would be

\[\large A = \pi r^2\]
\[\large A = 11^2 \pi\]
\[\large A = 121 \pi\]

Answer 4

Is it 379.94

Answer 5

No, it's 121pi. That is exact, since pi is transcendental, you can't express it with a few numbers.