3502.8584=4*3.14*r^2

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Solution for 3502.8584=4*3.14*r^2 equation: 


Simplifying
3502.8584 = 4 * 3.14r2

Multiply 4 * 3.14
3502.8584 = 12.56r2

Solving
3502.8584 = 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.
3502.8584 + -12.56r2 = 12.56r2 + -12.56r2

Combine like terms: 12.56r2 + -12.56r2 = 0.00
3502.8584 + -12.56r2 = 0.00

Add '-3502.8584' to each side of the equation.
3502.8584 + -3502.8584 + -12.56r2 = 0.00 + -3502.8584

Combine like terms: 3502.8584 + -3502.8584 = 0.0000
0.0000 + -12.56r2 = 0.00 + -3502.8584
-12.56r2 = 0.00 + -3502.8584

Combine like terms: 0.00 + -3502.8584 = -3502.8584
-12.56r2 = -3502.8584

Divide each side by '-12.56'.
r2 = 278.89

Simplifying
r2 = 278.89

Take the square root of each side:
r = {-16.7, 16.7}

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