Solve for r
r=\frac{2\sqrt[3]{5}}{5}\approx 0.683990379
Assign r
r≔\frac{2\times 25^{\frac{2}{3}}}{25}
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r=\sqrt[3]{\frac{32}{100}}
Multiply 4 and 8 to get 32.
r=\sqrt[3]{\frac{8}{25}}
Reduce the fraction \frac{32}{100} to lowest terms by extracting and canceling out 4.
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