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Shtirlitz [24]
4 years ago
5

6. A password contains at least 8 distinct digits. It takes 12 seconds to try one combination, what is the minimum amount of tim

e required to guarantee access to the database?
Computers and Technology
1 answer:
Agata [3.3K]4 years ago
7 0

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 \frac{21772800}{3600}=6048 hours

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Answer:

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Explanation:

In order to create a vector in Matlab you can use colon notation:

x = j:k

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x = 29:73

Then you can extract the even numbers by extracting the numbers with even index (2,4,6,etc.) of your vector:

x_even = x(2:2:end);

In the line of code above, we define <em>x_even</em> as all the elements of x with even index from index 2 till the end index of your vector, and an increment of 2 in the index: 2,4,6,etc.

If you want the odd numbers, just use the odd indices of your vector:

x_odd = x(1:2:end);

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