(c) 10
(c) 8000
(a) o
(b) 1
How many 4-digit numbers are there?
(a) 8999
(b) 9000
How many 7-digit numbers are there?
(a) 8999999
(b) 9000000
How many 8-digit numbers are there?
(a) 99999999 (b) 89999999
(c) 1000000
(c) 9000000
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mark me the brainliest... pls
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