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baherus [9]
3 years ago
5

A bank uses a computer program during the night to tell if the alarm should ring. Sensors in the bank set the following Boolean

variables:
vaultClosed: set to true if the bank vault is closed; otherwise false
heardNoise: set to true if a microphone heard noise; otherwise false
sawMovement: set to true if a camera saw movement in the bank; otherwise false

The automatic alarm should notify the police if there is noise and movement in the bank, or if the bank vault is open. Which boolean expressions can be used in a selection statement to ring the alarm?
Computers and Technology
1 answer:
Snowcat [4.5K]3 years ago
5 0

Answer:

(vaultClosed OR (heardNoise AND sawMovement))

Explanation:

The first step is to understand the conditions that must be satisfied to alarm notifies the police.

"The automatic alarm should notify the police IF there is noise and movement in the bank, or <u>IF</u> the bank vault is open".

The first IF (bold), sets the first condition which is formed by two sub-conditions: "noise AND movement". The word AND is very important because both sub-conditions must be satisfied, if there is noise but no movement, the the whole condition is not satisfied and the alarm does not notify, and vice versa.

The second IF (underlined), sets the second condition and is about the bank vault is open.

In conclusion, there are two ways to alarm notify the police.

  1. There is noise and movement (must be both)
  2. The bank vault is open

As can be either, the operator OR is used.

(condition 1) OR (condition 2)

Now, condition 1 is formed by two.

<u>FINAL EXPRESSION</u>

(condition 1) OR (condition 2)

((heardNoise equals True AND sawMovement equals True) OR vaultClosed equals True)

<u>REAL CODE</u>

Depending on the programming language you are using, the way to write the expression could vary. If C language is used, the expression would be:

if((heardNoise==1 && sawMovement==1) || vaultClosed==1))

The number 1 refers to the word TRUE

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PLEASE HELP ME!!!
Maksim231197 [3]

Answer:

Use NOT in a search to:

Explanation:

exclude words from your search

narrow your search, telling the database to ignore concepts that may be implied by your search terms

example:  cloning NOT sheep

8 0
2 years ago
Which of these is a requirement for developing game applications on devices running Apple’s iOS operating system?
andrey2020 [161]

Answer:

A. Xcode libraries

Explanation:

We have to find a requirement for developing game applications on devices running Apple’s iOS operating system. For that, I will evaluate each answer.

A. Xcode libraries

Xcode can be generally defined as a development kit or integrated development environment to facilitate the Apple software development. Apple use iOS operating system for its devices. To develop anything compatible with iOS, you generally have to code it using Xcode. Obviously, each development kit includes libraries for project to be built. Therefore, this option is correct.  

B. Android Development Kit

Just like Xcode, Android Development Kit is used to build the software for android. It is pretty much comprehensible from its name. So,  this option is false.  

C. ARM technology  and D. advanced microprocessors

These both options are related to hardware and available on both the devices. It is used for overall processing but these options are not that relevant to iOS operating system. Therefore, these options are false too.

So, Correct option is Xcode libraries.

5 0
3 years ago
Read 2 more answers
Which of the following is non-volatile storage?
gulaghasi [49]
Primary because it is non-volatile storage
6 0
3 years ago
A signal travels from point A to point B. At point A, the signal power is 100 W. At point B, the power is 90 W. What is the atte
11Alexandr11 [23.1K]

Answer:

Attenuation = 0.458\ db

Explanation:

Given

Power at point A = 100W

Power at point B = 90W

Required

Determine the attenuation in decibels

Attenuation is calculated using the following formula

Attenuation = 10Log_{10}\frac{P_s}{P_d}

Where P_s = Power\ Input and P_d  = Power\ output

P_s = 100W

P_d = 90W

Substitute these values in the given formula

Attenuation = 10Log_{10}\frac{P_s}{P_d}

Attenuation = 10Log_{10}\frac{100}{90}

Attenuation = 10 * 0.04575749056

Attenuation = 0.4575749056

Attenuation = 0.458\ db <em>(Approximated)</em>

7 0
3 years ago
How are water resources and air adversely affected by environmental degardation?​
Nonamiya [84]

Answer:

Environmental degradation is one of the ten threats officially cautioned by the High-level Panel on Threats, Challenges and Change of the United Nations. The United Nations International Strategy for Disaster Reduction defines environmental degradation as "the reduction of the capacity of the environment to meet social and ecological objectives, and needs".[4] Environmental degradation comes in many types. When natural habitats are destroyed or natural resources are depleted, the environment is degraded. Efforts to counteract this problem include environmental protection and environmental resources management.

There are many examples of environmental degradation throughout the world. A recent example is the 2019 Amazon rainforest wildfires. The Amazon makes up 60% of all rainforests. It is the earth's lungs and with it getting destroyed is posing a huge threat to the environment and the whole world. The effects of the deforestation will pose major impacts on the world around us. The constant cutting down of trees is getting rid of our oxygen supply as well as the absorption of co2. With the continuation of deforestation we will have less available oxygen in the world which could have detrimental effects on human health. An alternate issue that results from this is the overconsumption and waste of the paper products that come from those trees. The waste it typically produces does not get recycled, therefore, immense amount of waste is created. An additional harmful result from this is the degradation of the soil. The constant deforestation causes the soil to become less nutrient which will make it harder to be used again.

Explanation:

Environmental degradation is one of the ten threats officially cautioned by the High-level Panel on Threats, Challenges and Change of the United Nations. The United Nations International Strategy for Disaster Reduction defines environmental degradation as "the reduction of the capacity of the environment to meet social and ecological objectives, and needs".[4] Environmental degradation comes in many types. When natural habitats are destroyed or natural resources are depleted, the environment is degraded. Efforts to counteract this problem include environmental protection and environmental resources management.

There are many examples of environmental degradation throughout the world. A recent example is the 2019 Amazon rainforest wildfires. The Amazon makes up 60% of all rainforests. It is the earth's lungs and with it getting destroyed is posing a huge threat to the environment and the whole world. The effects of the deforestation will pose major impacts on the world around us. The constant cutting down of trees is getting rid of our oxygen supply as well as the absorption of co2. With the continuation of deforestation we will have less available oxygen in the world which could have detrimental effects on human health. An alternate issue that results from this is the overconsumption and waste of the paper products that come from those trees. The waste it typically produces does not get recycled, therefore, immense amount of waste is created. An additional harmful result from this is the degradation of the soil. The constant deforestation causes the soil to become less nutrient which will make it harder to be used again.

4 0
3 years ago
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