Answer:
multiply the legth times width
Step-by-step explanation:
Each digit can be 0-9 ( 10 numbers)
there are 9 numbers in a social security number
multiply 10 nine times:
10 x 10 x 10 x 10 x 10 x 10 x 10 x 10 x 10 = 1,000,000,000 ( 1 billion) possibilities.
the restriction is it can't be all zeros so subtract 1 from the total
1,000,000,000 - 1 = 999,999,999 combinations
To be honest there are lots of different reasons. You might want to try and talk to him to let him now how he is making you feel.
42100000, so this is in scientific notation.
