-1
$\begingroup$

I am not divisible by anything, but there's a formula to find my value.

I have a 9 in the ten-billionths place.

Multiply me by $d$ to get $c$.

$\endgroup$
0

1 Answer 1

5
$\begingroup$

The answer is

$\pi$


Multiply me by $d$ to get $c$.

Pi times the diameter of a circle is the circumference.

I have a 9 in the ten-billionths place.

Pi's decimal value is 3.141592653589...

there's a formula to solve my value.

There are a number of continued fractions that evaluate to $\pi$.

$\endgroup$

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.