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3 years ago

Jack wants to save his PowerPoint file electronically. He should store his file in:

Computers and Technology

2 answers:

RSB [31]3 years ago

8 0

Answer:

Explanation:

Easy to use

Vikentia [17]3 years ago

3 0

Answer:

C. USB

Explanation:

A USB Disk allows for a Backup of the PowerPoint file in case Jack needs it in the future.

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To protect the computer network of a large organization, network engineers monitor network traffic. This traffic is compared to

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Prove whether each argument is valid or invalid. First find the form of the argument by defining predicates and expressing the h

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Answer:

The given argument ∀x (S(x) ∧ (M(x) V D(x)) --> ¬ A(x)) ∧ S(Penelope) ∧ A(Penelope) -->¬ D(Penelope) is valid.

Explanation:

Solution:

Let us Consider following predicates:

M(x): x missed the class

D(x): x got a detention

S(x): x is a student in the class

A(x): x got an A

Now,

We Express the hypotheses and conclusion as:

The hypotheses: ∀x (S(x) ∧ (M(x) V D(x)) --> A(x)) and S(Penelope) and A(Penelope)

So,

The Conclusion: D(Penelope)

Thus,

The Argument:

∀x (S(x) ∧ (M(x) V D(x)) --> A(x)) ∧ S(Penelope) ∧ A(Penelope) -->D(Penelope)

Then,

The given argument is valid or correct and prove using the inference rule as follows:

Step Premises Reason (Rule used)

1. ∀x (S(x) ∧ (M(x) V D(x)) --> A(x)) Premise

2. S(Penelope) ∧ (M(Penelope)

V D(Penelope)) --> ¬ A(Penelope) Universal instantiation

3. S(Penelope) Premise

4. A(Penelope) Premise

5. ¬[S(Penelope) ∧ (M(Penelope)

V D(Penelope))] 2,4, Modus Tollens

6. ¬S(Penelope) V (¬M(Penelope)

∧ ¬D(Penelope)) De Morgan law

7.¬M(Penelope) ∧ ¬D(Penelope) 3,6,Disjunctive Syllogism

8¬D(Penelope) 7, Simplification

Therefore, the given argument ∀x (S(x) ∧ (M(x) V D(x)) --> ¬ A(x)) ∧ S(Penelope) ∧ A(Penelope) -->¬ D(Penelope) is valid.

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