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.

- algebra 2 -
**Damon**, Saturday, November 27, 2010 at 8:30pm
9*10*10*10*10*10*10

9*10^6

- algebra 2 -
**Anonymous**, Monday, September 15, 2014 at 1:21am
Write (1.8x10^-12) (2.1x10^-3)

- algebra 2 -
**Samantha**, Monday, September 15, 2014 at 1:21am
Write (1.8x10^-12) (2.1x10^-3) in scientific notation

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