5859.9936=4*3.14*r^2

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Solution for 5859.9936=4*3.14*r^2 equation: 


Simplifying
5859.9936 = 4 * 3.14r2

Multiply 4 * 3.14
5859.9936 = 12.56r2

Solving
5859.9936 = 12.56r2

Solving for variable 'r'.

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

Add '-12.56r2' to each side of the equation.
5859.9936 + -12.56r2 = 12.56r2 + -12.56r2

Combine like terms: 12.56r2 + -12.56r2 = 0.00
5859.9936 + -12.56r2 = 0.00

Add '-5859.9936' to each side of the equation.
5859.9936 + -5859.9936 + -12.56r2 = 0.00 + -5859.9936

Combine like terms: 5859.9936 + -5859.9936 = 0.0000
0.0000 + -12.56r2 = 0.00 + -5859.9936
-12.56r2 = 0.00 + -5859.9936

Combine like terms: 0.00 + -5859.9936 = -5859.9936
-12.56r2 = -5859.9936

Divide each side by '-12.56'.
r2 = 466.56

Simplifying
r2 = 466.56

Take the square root of each side:
r = {-21.6, 21.6}

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