a company wants to have 8-digit phone extensions with the first digit not being zero, how many different phone extensions are po

Question

Ivanshal [37]

3 years ago

10

a company wants to have 8-digit phone extensions with the first digit not being zero, how many different phone extensions are po

ssible?______

Mathematics

2 answers:

Ganezh [65] · Answer 1 · 2022-02-14T03:55:03+03:00

Ganezh [65]3 years ago

3 0

90,000,000 is the answer

nekit [7.7K] · Answer 2 · 2022-02-14T06:06:52+03:00

nekit [7.7K]3 years ago

3 0

1,2,3,4,5,6,7,8,9,0
10 numbers

we can repeat
9 choices for first digit
10 for second
10 for third
10 for fourth
10 for fifth
10 for sixth
10 for seventh
10 for eighth

9*10*10*10*10*10*10*10 choices or
90,000,000 different extentions