510000000=4(3.14)r^2

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Solution for 510000000=4(3.14)r^2 equation: 


Simplifying
510000000 = 4(3.14) * r2

Multiply 4 * 3.14
510000000 = 12.56r2

Solving
510000000 = 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.
510000000 + -12.56r2 = 12.56r2 + -12.56r2

Combine like terms: 12.56r2 + -12.56r2 = 0.00
510000000 + -12.56r2 = 0.00

Add '-510000000' to each side of the equation.
510000000 + -510000000 + -12.56r2 = 0.00 + -510000000

Combine like terms: 510000000 + -510000000 = 0
0 + -12.56r2 = 0.00 + -510000000
-12.56r2 = 0.00 + -510000000

Combine like terms: 0.00 + -510000000 = -510000000
-12.56r2 = -510000000

Divide each side by '-12.56'.
r2 = 40605095.54

Simplifying
r2 = 40605095.54

Take the square root of each side:
r = {-6372.212766379, 6372.212766379}

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