then he paid another 75 for a bag of chips how much money did he have left
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HESI A2

HESI A2 Math Portion

1. After spending money on a sandwich, a drink, and a bag of chips, how much money did the man have left from his initial $10?

Correct answer: B

Rationale: After spending $6.50 on a sandwich, the man had $3.50 left. Then, after spending $1.80 on a drink, he had $1.70 left. Finally, he spent another $0.75 on a bag of chips. Subtracting $0.75 from $1.70 gives us $0.95, which is the amount of money he had left. Choice A is incorrect because it does not consider the bag of chips he bought. Choice C is incorrect as it miscalculates the remaining amount. Choice D is incorrect as it does not account for the total expenses.

2. She was so mad at her boyfriend, she __________ on him when he called.

Correct answer: D

Rationale: 'Hung up' is correct because it is the proper phrasal verb used when referring to ending a phone call. In this context, the sentence implies that the woman ended the call abruptly due to being angry. 'Yelled' and 'Screamed' both suggest vocalizing loudly, which doesn't fit the situation described. 'Speak' is incorrect as it should be 'spoke' for proper verb tense agreement.

3. What is the primary function of platelets in the blood?

Correct answer: C

Rationale: The correct answer is C: To clot blood. Platelets, also known as thrombocytes, have a primary function in blood clotting. They help in the process of coagulation, forming clots to prevent excessive bleeding when injuries occur. Platelets play a crucial role in maintaining the integrity of the circulatory system by sealing off damaged blood vessels and promoting wound healing. Choices A, B, and D are incorrect because platelets do not carry oxygen, fight infections, or transport nutrients in the blood.

4. Which statement is untrue?

Correct answer: D

Rationale: DNA can be altered through various processes such as mutations, genetic engineering, and epigenetic modifications. Changes in DNA can occur naturally or through external influences, leading to variations in the genetic code. Therefore, the statement that DNA cannot be altered is untrue. Choices A, B, and C are true statements. RNA is indeed single-stranded, RNA contains uracil instead of thymine, and DNA serves as a template for protein synthesis.

5. Which parts of the heart are separated by the mitral valve?

Correct answer: D

Rationale: The mitral valve, also known as the bicuspid valve, separates the left atrium and the left ventricle of the heart. Its primary function is to prevent the backflow of blood from the left ventricle to the left atrium during the heart's contraction. Therefore, option D, 'Left atrium and left ventricle,' is the correct answer. Choices A, B, and C are incorrect because they do not represent the parts separated by the mitral valve.

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