which sentence correctly uses a colon

HESI A2

Vocabulary HESI A2 Practice Test

1. Which sentence correctly uses a colon?

A. She had one goal: to win the race.
B. He needs milk, eggs, and bread.
C. The meeting is at 3 PM.
D. She bought milk, eggs, bread.

Correct answer: A

Rationale: The correct answer is A: 'She had one goal: to win the race.' This sentence uses a colon to introduce the purpose or explanation that follows. It is a grammatically correct use of a colon. Choice B is incorrect as the colon is not needed after 'needs'; a list of items follows, which does not require a colon. Choice C is a simple statement of time and does not require a colon. Choice D is also incorrect since a colon is not suitable after 'bought'; the items bought are listed without the need for a colon.

2. A researcher is collecting data on patient satisfaction. Out of 150 patients surveyed, 120 reported being satisfied with their care. What percentage of the patients were satisfied?

A. 80%
B. 75%
C. 85%
D. 90%

Correct answer: A

Rationale: To find the percentage of satisfied patients, divide the number of satisfied patients by the total number of patients surveyed and multiply by 100. In this case, 120 (satisfied patients) ÷ 150 (total patients surveyed) x 100 = 80%. Therefore, 80% of the patients were satisfied. Choice B (75%), C (85%), and D (90%) are incorrect percentages as the actual percentage of satisfied patients is 80%.

3. What are bases or alkaline solutions known as?

A. Hydrogen acceptors
B. Solutions of low pH
C. Hydrogen donors
D. Amphoteric

Correct answer: A

Rationale: Bases or alkaline solutions are known as 'hydrogen acceptors.' They accept protons (H+) in chemical reactions, as opposed to acids that donate protons. This property allows bases to neutralize acids and form salts. Choice B, 'Solutions of low pH,' is incorrect because bases have high pH values, not low. Choice C, 'Hydrogen donors,' is incorrect as bases do not donate protons but accept them. Choice D, 'Amphoteric,' refers to substances that can act as both acids and bases, which is not the definition of bases. Therefore, the correct answer is A.

4. If Mr. Johnson gives half of his pay to his family, $250 to his landlord, and has exactly 3/7 of his pay left over, how much pay does he receive?

A. $3,600
B. $3,500
C. $2,800
D. $1,750

Correct answer: B

Rationale: Let Mr. Johnson's pay be represented as x. After giving half of his pay to his family, he has x/2 left. Subtracting $250 paid to his landlord, he has x/2 - $250 remaining. Given that this remaining amount is 3/7 of his original pay, the equation becomes x/2 - $250 = 3x/7. Solving this equation shows that x = $3,500. Therefore, Mr. Johnson receives $3,500. Choices A, C, and D are incorrect as they do not align with the correct calculation based on the given conditions in the question.

5. Choose the meaning of the word 'persistent' in the following sentence: 'The elderly patient has been fighting a persistent cold.'

A. Typical
B. Harmless
C. Without cure
D. Lasting a long time

Correct answer: D

Rationale: In the sentence provided, the word 'persistent' is used to describe the cold, indicating that it has been lasting for a long time without going away easily. This choice emphasizes the prolonged nature of the cold. Choices A, B, and C are incorrect because 'persistent' does not mean 'typical,' 'harmless,' or 'without cure' in this context. The key is to focus on the word's meaning in relation to the duration of the cold.