Question

Find the radius of a circle with a circumference of 64 inches?

Answer 1

`r = 32/(pi) ~~10.186`

Explanation:

`pi` is the ratio between a circle's circumference and diameter.
In other words,
`C = pid = 2pir`

Plug in your information:
`64 = 2pir`

`64/(2pi) = (cancel(2pi)r)/cancel(2pi)`

`64/(2pi) = r`

`32/(pi) = r`

`r~~10.186`