Answer:
6048 hours is required to guarantee access to the database
Explanation:
If a password contains 8 distinct digits, then there are P(10,8) permutations possible
P(10,8)=10! / (10-8)! = 10!/2! = 1814400
Since it takes 12 seconds to try one combination,
1814400×12 = 21772800 seconds is required to guarantee access to the database. This is [tex]\frac{21772800}{3600}=6048 hours[/tex]
