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Posted by **slomomo** on Monday, March 18, 2013 at 1:26pm.

- College Mathematics -
**Reiny**, Monday, March 18, 2013 at 1:51pmIf the lead digit can be a zero

then 10^9

If the lead digit cannot be a zero

then 9(10^8)

- College Mathematics -
**Reiny**, Monday, March 18, 2013 at 1:52pmIf the lead digit can be a zero

then 10^9

If the lead digit cannot be a zero

then 9(10^8)

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