Respuesta :
10*10*10*10 = 10,000.
Because you can use either of then digits for each space.
Also, you can see that the valid numbers are from 0000 to 9999 = 9999 + 1 = 10,000 numbers.
Because you can use either of then digits for each space.
Also, you can see that the valid numbers are from 0000 to 9999 = 9999 + 1 = 10,000 numbers.
Answer:
10,000
Step-by-step explanation:
i used this answer and got it right