When are computers most vulnerable to threats or damage?

Citing the recent increase in earnings by several computer companies, economists feel that a cycle has begun in which personal c

VashaNatasha [74]

Answer:

A) a cycle has begun in which personal computer users

Explanation:

Option A as already used in the question fits and and completes the question correctly, this is because the because the writter is trying to communicate a new 'era', 'dispensention', 'period' or 'season'.... this is appropriately communicated with the word 'cycle'.

5 0

2 years ago

A smart refrigerator can use what to detect when you are running low on milk, and then send a reminder to you on a wireless.

Olegator [25]

Answer:

RFID scanning or Barcode reader

Explanation

Smart refrigerators have inbuilt RFID scanning technology that help monitor the stock that is inside your fridge. Once you pass your items through the inbuilt RFID scanner in the fridge, the barcode of your items is cross-referenced with a database and given a unique tag for identification. This technology helps detect and track the stock that is inside your fridge and when you start running low, the RFID can be triggered to send a reminder as a notification on your email or a text message.

3 0

2 years ago

Information systems security is the collection of activities that protect the information system and the data stored in it.

ivann1987 [24]

Answer:

The answer is A. True.

Explanation:

Information systems security,refers to all the methods involved with assuring information integrity as well as keeping it confidential, and available.

It can also be defined as -

The detection and provisoon of solutions to security breaches.

Access controls, which prevents unauthorized system access.

Protection of information either in transit or in a storage area.

3 0

2 years ago

This is not what I asked for

jolli1 [7]

?? What does that mean? What is the question

3 0

2 years ago

What would you have to know about the pivot columns in an augmented matrix in order to know that the linear system is consistent

Scrat [10]

Answer:

The Rouché-Capelli Theorem. This theorem establishes a connection between how a linear system behaves and the ranks of its coefficient matrix (A) and its counterpart the augmented matrix.

$rank(A)=rank\left ( \left [ A|B \right ] \right )\:and\:n=rank(A)$

Then satisfying this theorem the system is consistent and has one single solution.

Explanation:

1) To answer that, you should have to know The Rouché-Capelli Theorem. This theorem establishes a connection between how a linear system behaves and the ranks of its coefficient matrix (A) and its counterpart the augmented matrix.

$rank(A)=rank\left ( \left [ A|B \right ] \right )\:and\:n=rank(A)$

$rank(A)$

Then the system is consistent and has a unique solution.

$\left\{\begin{matrix}x-3y-2z=6 \\ 2x-4y-3z=8 \\ -3x+6y+8z=-5 \end{matrix}\right.$

2) Writing it as Linear system

$A=\begin{pmatrix}1 & -3 &-2 \\ 2& -4 &-3 \\ -3 &6 &8 \end{pmatrix}$ $B=\begin{pmatrix}6\\ 8\\ 5\end{pmatrix}$

$rank(A) =\left(\begin{matrix}7 & 0 & 0 \\0 & 7 & 0 \\0 & 0 & 7\end{matrix}\right)=3$

3) The Rank (A) is 3 found through Gauss elimination

$(A|B)=\begin{pmatrix}1 & -3 &-2 &6 \\ 2& -4 &-3 &8 \\ -3&6 &8 &-5 \end{pmatrix}$

$rank(A|B)=\left(\begin{matrix}1 & -3 & -2 \\0 & 2 & 1 \\0 & 0 & \frac{7}{2}\end{matrix}\right)=3$

4) The rank of (A|B) is also equal to 3, found through Gauss elimination:

So this linear system is consistent and has a unique solution.

8 0

2 years ago