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Hi

If diameter is (1.3x1012), then radius is equal to 0.5x(1.3x1012)= (0.65x1012) = 657.8 meters.

But, if diameter is (1.3x10^12) , then radius is equal to 0.5x(1.3x10^12) = (0.65x10^12) =(6.5x10^11) = 650000000000 meters.

Good luck.

Take care, byes :)

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16y ago

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