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3 years ago

A peripheral can be used to tell a computer to complete a specific task. A) True B)False

Computers and Technology

1 answer:

RoseWind [281]3 years ago

8 0

Answer:

A. true

Explanation:

because you can complete it without it mistakes if your using an computer but if you use an paper you will make mistakes over and over

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Two machines can finish a job in StartFraction 20 Over 9 EndFraction hours. Working alone, one machine would take one hour long

Alborosie

Answer

5 hours

Explanation

The two working together can finish a job in

$\frac{20}{9} \: hours$

Also, working alone, one machine would take one hour longer than the other to complete the same job.

Let the slower machine working alone take x hours. Then the faster machine takes x-1 hours to complete the same task working alone.

Their combined rate in terms of x is

$\frac{1}{x} + \frac{1}{x - 1}$

This should be equal to 20/9 hours.

$\frac{1}{x} + \frac{1}{x - 1} = \frac{9}{20}$

Multiply through by;

$20x(x - 1) \times \frac{1}{x} +20x(x - 1) \times \frac{1}{x - 1} = 20x(x - 1) \times \frac{9}{0}$

$20(x - 1) +20x = 9x(x - 1)$

$20x - 20+20x = 9{x}^{2} - 9x$

$9{x}^{2} - 9x - 20x - 20x + 20= 0$

$9{x}^{2} - 49x + 20= 0$

Factor to get:

$(9x - 4)(x - 5) = 0$

$x = \frac{4}{9} \: or \: x = 5$

It is not feasible for the slower machine to complete the work alone in 4/9 hours if the two will finish in 20/9 hours.

Therefore the slower finish in 5 hours.

8 0

3 years ago

Assume a future where security counter measures against DoS attacks are much more widely implemented than at present. In this fu

Amiraneli [1.4K]

Answer:

yes administrators have to be concerned

Explanation:

It is necessary for countermeasures to be taken against DoS attacks

The types of attacks that can still occur are:

If the network connection get to be overloaded, there could be flash crown of this computer system and fraudulent activities maybe initiated. By flash crowd we mean that the there is a great deal of traffic on the system and this could cause the network connection to be destroyed.

To reduce the impact of this kind of attacks,

1. there should be enough or excess network bandwidth and distributed servers should be replicated if there is a possibility that network could get to be overloaded.

2. restriction is more commonly done on sporting sites. Restriction brings about an increase in implementation cost.

3. The impact of this type of attack can be reduced by stopping unwanted traffic throught the implementation of filters

4. Use strong antivirus on computer sytems that are used to connect to the internet

7 0

3 years ago

Sometimes, fourth-generation languages (4GLs) are called procedural languages

irakobra [83]

Hi!

In 1981, the term 4GL was actually used to refer to languages which were non-procedural. A procedural language does not possess object-oriented capabilities. 4GL's often times have OOP properties, so I believe the answer to this question is going to be false. =)

7 0

3 years ago

In this screenshot, the circled item is the

gavmur [86]

Answer:

Favorites tab/bar

Explanation:

6 0

3 years ago

Read 2 more answers

Write a python program to calculate the sum of three numbers and as well require the user to input the numbers.

beks73 [17]

Answer:

numbers = []

for i in range(3):

numbers.append(eval(input("Enter number: ")))

print('Sum is:', sum(numbers))

Explanation:

You want to use a loop to prevent repeating your code.

8 0

3 years ago