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The answer is 8. 500000000x2=one billion.And I am 10 and I did it myself.
the "bi-" prefix implies 2;

  • In countries that use the long scale (based on powers of a million) like Europe:
1 billion = (106)2 = 1012 = 1 followed by 12 zeros = 10 followed by 11 zeros
1/2 of this would be 5 followed by 11 zeros
ie eleven.
  • In countries that use the short scale (based on powers of a thousand plus one) like USA:
1 billion = (103)2+1 = 109 = 1 followed by 9 zeros = 10 followed by 8 zeros
1/2 of this would be 5 followed by 8 zeros
ie eight.
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11y ago
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