HESI A2 Quizlet Math

Correct Answer: A

Rationale: To find the total cost of the comics, multiply $2.65 by 3, which equals $7.95. To determine the change, subtract the total cost from the amount paid: $20 - $7.95 = $12.05. Therefore, Robert received $12.05 in change. Option B is incorrect because it miscalculates the change. Option C is incorrect as it only accounts for one comic's cost. Option D is incorrect as it does not consider the total cost of all three comics.

Correct Answer: B

Rationale: To find X, we can see that 81 is the square of 9 and 27 is the cube of 3. Therefore, X should be the cube root of 81, which is 3. Hence, the correct answer is B. Choice A is incorrect because 3 is the cube root of 27, not 81. Choice C is incorrect as 21 is not a perfect cube of any number. Choice D is incorrect because 9 is the cube itself, not the cube root.

Correct Answer: A

Rationale: To find the LCM of 4 and 6, identify the prime factors of each number: 4 = 2^2 and 6 = 2 * 3. The LCM includes all prime factors with the highest powers, so LCM(4, 6) = 2^2 * 3 = 12. Therefore, the correct answer is A (24), as it is the product of the prime factors 2^2 and 3, which is the least common multiple of 4 and 6. Choices B, C, and D are incorrect because they do not represent the correct combination of prime factors for the LCM of 4 and 6.

Correct Answer: A

Rationale: To determine the money left after shopping, subtract the total expenses ($101.85 + $21.90 + $42.66 = $166.41) from the initial cash amount ($200.00). Thus, $200.00 - $166.41 = $33.59 left. Choice A is correct. Choices B, C, and D are incorrect as they do not reflect the accurate remaining amount after subtracting the total expenses from the initial cash.

Correct Answer: A

Rationale: To find 28% of 100, you multiply 100 by 0.28 (28% as a decimal). So, 100 x 0.28 = 28. Therefore, the correct answer is A: 28. Option B (20) is incorrect because it represents 20%, not 28%. Option C (25) is incorrect as it is not the result of calculating 28% of 100. Option D (30) is also incorrect as it represents 30%, not 28% of 100.