Question

solve: C=2pir

Answer 1

Is there anything to solve FOR?

This *as it is* is a formula....

For the Circumference of a circle...

Circumference = 2 * pi * r

Answer 2

the question is asking me to solve for r

Answer 3

And then it asks me to choose all equivalent variations for my answer

Answer 4

There is nothing to solve for. It is a given formula.
You can solve it if you have a variable for r. But as it is you can't solve anything.

Answer 5

if it means just to rearrange it then.... to solve for 'r'...you must rearrange this equation FOR r.

You have

C = 2 * pi * r

so to solve for 'r'...you must isolate it...and divide both sides by 2pi

this gives you

r = C
---
2pi

Answer 6

Great thank you!!!!