Question

The radius of a circle is 11.7 in. Find the circumference \textit{to the nearest tenth}to the nearest tenth.

Answer 1

R = 11.7

C =
`2\pi r`

Step-by-step:

Subsitute r with 11.7

`C = 2\pi 11.7`

Multiply 2 * 11.7

`C = 23.4\pi`

Multiply 23.4 * pi

`C = 73.5` :)

Answer 2

73.5

Explanation:

circumference = 2πr , where r = radius

given radius = 11.7 so r = 11.7

C = 2πr

==> plug in r = 11.7

C = 2π(11.7)

==> multiply 2 and 11.7

C = 23.4π

==> multipl 23.4 and π

C = 73.5 ( rounded to the nearest tenth )