C = 2πr Divide both sides by 2r

= π Switch the sides to make it easier to read
π = <span>

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<u>Answer:</u>

<u>Step-by-step explanation:</u>
We are given the following expression and we are to simplify it:

To make it easier to solve, we can also write this expression as:

Now we will cancel out the like terms to get:

Taking the square root of the terms to get:


Answer:
-3
Step-by-step explanation: