.333(3.14)r^2(8.5)=142

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Solution for .333(3.14)r^2(8.5)=142 equation: 


Simplifying
0.333(3.14) * r2(8.5) = 142

Reorder the terms for easier multiplication:
0.333 * 3.14 * 8.5r2 = 142

Multiply 0.333 * 3.14
1.04562 * 8.5r2 = 142

Multiply 1.04562 * 8.5
8.88777r2 = 142

Solving
8.88777r2 = 142

Solving for variable 'r'.

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

Divide each side by '8.88777'.
r2 = 15.97701111

Simplifying
r2 = 15.97701111

Take the square root of each side:
r = {-3.997125356, 3.997125356}

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