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Simplifying
4069.44 = 3.14r2
Solving
4069.44 = 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.
4069.44 + -3.14r2 = 3.14r2 + -3.14r2
Combine like terms: 3.14r2 + -3.14r2 = 0.00
4069.44 + -3.14r2 = 0.00
Add '-4069.44' to each side of the equation.
4069.44 + -4069.44 + -3.14r2 = 0.00 + -4069.44
Combine like terms: 4069.44 + -4069.44 = 0.00
0.00 + -3.14r2 = 0.00 + -4069.44
-3.14r2 = 0.00 + -4069.44
Combine like terms: 0.00 + -4069.44 = -4069.44
-3.14r2 = -4069.44
Divide each side by '-3.14'.
r2 = 1296
Simplifying
r2 = 1296
Take the square root of each side:
r = {-36, 36}
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