Please please help

How many ways can you choose and arrange five of the ten digits 0 through 9, without repetition, so that the first is not zero?

Please show your thinking, so we can see where you need help:
 
How many numbers in the range 10000 to 99999 have no repeated digits?
\(\boxed{\color{white}|\;\;\;}\;\boxed{\color{white}|\;\;\;}\;\boxed{\color{white}|\;\;\;}\;\boxed{\color{white}|\;\;\;}\;\boxed{\color{white}|\;\;\;}\;\)
You will want to fill those boxes one of the ten digits, using the digit only once.
1) How many choices do you have for the first box?
2) Remembering the digits do not repeat, how many choices do you have for the second box?
3) How many choices do you have for the each of the other boxes?
Once you post these three answers, we can check them if needed help your further.
 
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