5085.66=3.14*r^2

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Solution for 5085.66=3.14*r^2 equation: 


Simplifying
5085.66 = 3.14r2

Solving
5085.66 = 3.14r2

Solving for variable 'r'.

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

Add '-3.14r2' to each side of the equation.
5085.66 + -3.14r2 = 3.14r2 + -3.14r2

Combine like terms: 3.14r2 + -3.14r2 = 0.00
5085.66 + -3.14r2 = 0.00

Add '-5085.66' to each side of the equation.
5085.66 + -5085.66 + -3.14r2 = 0.00 + -5085.66

Combine like terms: 5085.66 + -5085.66 = 0.00
0.00 + -3.14r2 = 0.00 + -5085.66
-3.14r2 = 0.00 + -5085.66

Combine like terms: 0.00 + -5085.66 = -5085.66
-3.14r2 = -5085.66

Divide each side by '-3.14'.
r2 = 1619.636943

Simplifying
r2 = 1619.636943

Take the square root of each side:
r = {-40.24471323, 40.24471323}

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