3.14r(r)=128

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Solution for 3.14r(r)=128 equation: 


Simplifying
3.14r(r) = 128

Multiply r * r
3.14r2 = 128

Solving
3.14r2 = 128

Solving for variable 'r'.

Move all terms containing r to the left, all other terms to the right.

Divide each side by '3.14'.
r2 = 40.76433121

Simplifying
r2 = 40.76433121

Take the square root of each side:
r = {-6.384695076, 6.384695076}

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