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

## Answer this Question

## Related Questions

- math,correction, bobpursly - Since when is 5^7 =8125? if a number is a multple ...
- math,correction - can someone correct this for me parts A-E and if i am wrong ...
- math - The number uses every number 0-9 the numbers are used only once the ...
- math - a 7 digit phone number has a 3 digit prefix followed by 4 digits.how many...
- math - how many different positive four-digit integers can be formed if the ...
- algebra - How many different seven digit phone numbers are available if the only...
- Math. Explain - From the digits 1, 2, 3, and 4, how many positive integers are ...
- math - this code has five digit 1,2,3,4,5. the first digit plus the second digit...
- algebra - Beginning with cars made in 1981, all vehicles must contain a 17-digit...
- college math - How many different four-digit numbers can be formed from the ...

More Related Questions