Where can buy a piece of robots for my class

a password to a certain database consists of digits that cannot be repeated. if the password is known to consist of at least 8 d

BaLLatris [955]

Answer:

$\frac{10!}{2}mins$

Explanation:

12 seconds to try one combination will be equivalent to $\frac{1}{12}\times 60 = \frac{1}{5} \ mins$

Password contain at least 8 digit i.e. password can contain 8, 9, 10 digit.

Password cannot contain more than 10 digit because it will give room for repetition which it is clearly stated that digit cannot be repeated.

Possible digit that can be used: 9,8,7,6,5,4,3,2,1,0.

Total number of passwords combination possible for each position in 8 digit.

1st position = 10, 2nd position = 9, 3rd position = 8, 4th position = 7, 5th position = 6, 6th position = 5, 7th position = 4, 8th position = 3. Total number of passwords combination possible in 8 digit is equivalent to $\frac{10!}{2}$ .

Total number of passwords combination possible for each position in 9 digit.

1st position = 10, 2nd position = 9, 3rd position = 8, 4th position = 7, 5th position = 6, 6th position = 5, 7th position = 4, 8th position = 3, 9th position = 2. Total number of passwords combination possible in 9 digit is equivalent to $\frac{10!}{1}$ .

Total number of passwords combination possible for each position in 10 digit.

1st position = 10, 2nd position = 9, 3rd position = 8, 4th position = 7, 5th position = 6, 6th position = 5, 7th position = 4, 8th position = 3, 9th position = 2, 10th position = 1. Total number of passwords combination possible in 10 digit is equivalent to 10!.

Adding them up and multiplying by $\frac{1}{5} \ mins$ to get the total number of time needed to guarantee access to database = $[\frac{10!}{2}\times\ \frac{10!}{1} \times 10!] \frac{1}{5}\ mins = \frac{10!}{2}$

7 0

3 years ago

Which kind of photography takes attractive photos of products to make them stand out?

CaHeK987 [17]

Answer:

See there are multiple ways to get a perfect shot of products to stand out but the most affective according to me are explained below :-

Macro shooting - These are close shots u can say really close just to show the product more attractive and u can see these types of shots in every advertisement.
Background shooting/shots - Opposite of macro shots.
3d shots - These are 360° shots.

Tip :- Use wide aperture like F2 and right aperture for right shots.

Hope it helps!

3 0

3 years ago

You are designing a VPC for a small application. It will operate in a private subnet and needs internet access to software updat

lilavasa [31]

Answer:

Refer below.

Explanation:

VPC, Subnets, Route Table(s), Nat Gateway, and Internet Gateway. These are the least required services to provide internet access to a private EC2 instance. NAT gateway requires an internet gateway.

3 0

4 years ago

Does anyone know how to execute this assignment on Scratch?

lapo4ka [179]

Execute this assignment from Scratch in the following way

Explanation:

1.For each thread, first Scratch sets the 'active thread' to that thread. Then, it executes each block one by one in the stack for the active thread. It will execute the entire stack all in one go if it can.

2.The Hide block is a Looks block and a Stack block. If the block's sprite is shown, it will hide the sprite — if the sprite is already hidden, nothing happens. This block is one of the simplest and most commonly used Looks blocks.

3.Scratch is used in many different settings: schools, museums, libraries, community centers, and homes.

4.Mitch Resnik, the creator of the super-simple Scratch programming language and head of the Lifelong Kindergarten group at the MIT Media Lab, gave a TEDx talk about the value of coding and computer literacy in early education.

5.

5 0

3 years ago

Class 7th Subject Computer all chapters 2nd page

LenKa [72]

no.13 answer is( B ) and no.14 answer is also (B)

7 0

3 years ago