Posted by mychelle on Saturday, November 27, 2010 at 7:20pm.
how many 7digit phone numbers are possible if the first digit must be nonzero? 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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