Posted by **mychelle** on Saturday, November 27, 2010 at 7:20pm.

how many 7-digit phone numbers are possible if the first digit must be non-zero? answer in scientific notation.

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March 24, 2017
Posted by **mychelle** on Saturday, November 27, 2010 at 7:20pm.

how many 7-digit phone numbers are possible if the first digit must be non-zero? answer in scientific notation.

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