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Elena-2011 [213]

3 years ago

7

1.Discuss why this class is important (or not) to a soon-to-be security practitioner. 2.Discuss one of more subjects you have le

arned so far in this class that was new to you, and how will this information help you in the future. 3.Building on question 2, how did this information help you to better understand information security. 4.Discuss some challenges you experienced/observed so far in this class. Do you have any recommendations for me to improve the content

Computers and Technology

1 answer:

KIM [24]3 years ago

8 0

Answer:

I just can't make out the question

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When you're working with a word processing document and you press the DEL Key what happens

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<span>The character to the right of the cursor is deleted. </span>

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3 years ago

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Variables set equal to patterns are said to be:_______.

NemiM [27]

Answer:

b. instantiated.

Explanation:

In computer programming, to be instatiated or when variables are instatiated; this simply refers to the acts of making example out of a group variables or a form of template. For example in a situation of class of objects.

Hence, in this case, the correct answer to the question above is the option B, in which Variables set equal to patterns are said to be INSTATIATED

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3 years ago

1. Define lexemes. Give an example of an lexeme in any programming language.<br>

tresset_1 [31]

The correct answer is; " a unit of lexical meaning that underlies a set of words that are related through inflection."

Further Explanation:

The lexeme is part of the stream where the tokens are taken and identified from. When these streams become broken, there is always an error message. The lexeme is known as "the building blocks of language."

These are a very important part of computer programming. If any string or character is misplaced this can stop the entire program or operation.

One example of a lexeme is;

the symbols (, ), and -> are for the letter C.

Learn more about computer programming at brainly.com/question/13111093

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3 years ago

_________________ uses soap or detergent to physically remove germs, dirt, and impurities from surfaces or objects.

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humans,washing mashines,dish washers

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2 years ago

A computer retail store has 15 personal computers in stock. A buyer wants to purchase 3 of them. Unknown to either the retail st

Dima020 [189]

Answer:

a. 1365 ways

b. Probability = 0.4096

c. Probability = 0.5904

Explanation:

Given

PCs = 15

Purchase = 3

Solving (a): Ways to select 4 computers out of 15, we make use of Combination formula as follows;

$^nC_r = \frac{n!}{(n-r)!r!}$

Where $n = 15\ and\ r = 4$

$^{15}C_4 = \frac{15!}{(15-4)!4!}$

$^{15}C_4 = \frac{15!}{11!4!}$

$^{15}C_4 = \frac{15 * 14 * 13 * 12 * 11!}{11! * 4 * 3 * 2 * 1}$

$^{15}C_4 = \frac{15 * 14 * 13 * 12}{4 * 3 * 2 * 1}$

$^{15}C_4 = \frac{32760}{24}$

$^{15}C_4 = 1365$

<em>Hence, there are 1365 ways </em>

Solving (b): The probability that exactly 1 will be defective (from the selected 4)

First, we calculate the probability of a PC being defective (p) and probability of a PC not being defective (q)

<em>From the given parameters; 3 out of 15 is detective;</em>

So;

$p = 3/15$

$p = 0.2$

$q = 1 - p$

$q = 1 - 0.2$

$q = 0.8$

Solving further using binomial;

$(p + q)^n = p^n + ^nC_1p^{n-1}q + ^nC_2p^{n-2}q^2 + .....+q^n$

Where n = 4

For the probability that exactly 1 out of 4 will be defective, we make use of

$Probability = ^nC_3pq^3$

Substitute 4 for n, 0.2 for p and 0.8 for q

$Probability = ^4C_3 * 0.2 * 0.8^3$

$Probability = \frac{4!}{3!1!} * 0.2 * 0.8^3$

$Probability = 4 * 0.2 * 0.8^3$

$Probability = 0.4096$

Solving (c): Probability that at least one is defective;

In probability, opposite probability sums to 1;

Hence;

<em>Probability that at least one is defective + Probability that at none is defective = 1</em>

Probability that none is defective is calculated as thus;

$Probability = q^n$

Substitute 4 for n and 0.8 for q

$Probability = 0.8^4$

$Probability = 0.4096$

Substitute 0.4096 for Probability that at none is defective

Probability that at least one is defective + 0.4096= 1

Collect Like Terms

Probability = 1 - 0.4096

Probability = 0.5904

8 0

2 years ago