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Answer 1

To rearrange the formula \( C = 2\pi r \) to solve for the radius \( r \), you would isolate \( r \) by dividing both sides of the equation by \( 2\pi \).

Here is how it's done:

1. Start with the original formula: \[ C = 2\pi r \]

2. Divide both sides by \( 2\pi \): \[ r = \frac{C}{2\pi} \]

Therefore, the correct rearranged formula to find the radius \( r \) is: \[ r = \frac{C}{2\pi} \]

None of the provided responses exactly match this result. Please ensure that the options given are checked against this correct formula.