HESI A2 Quizlet Math

Correct Answer: C

Rationale: To find the new dosage after a 20% increase, we first calculate 20% of the original dosage: 20% of 100mg = 0.2 * 100mg = 20mg. Then, we add this to the original dosage: 100mg + 20mg = 120mg. Therefore, the new dosage is 120mg (Choice C). Choices A, B, and D are incorrect because they do not reflect the correct calculation for a 20% increase from the original dosage of 100mg.

Correct Answer: C

Rationale: To find the perimeter of the honeycomb cell, we add the lengths of all six sides, which are 8mm each. Perimeter = 6 * 8mm = 48mm. Choice C (48mm) is correct. Other choices are incorrect because they do not account for the total length of all sides. Option A (32mm) would be the perimeter of a square with sides of 8mm. Option B (40mm) and Option D (56mm) are not the correct total length of all six sides.

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 product of 44.44 and 55.55, you multiply the two numbers: 44.44 * 55.55 = 2,468.64 Therefore, the correct answer is A. Choice B is incorrect as it is a round number and not the precise result of the multiplication. Choice C is incorrect because it does not match the result of the calculation. Choice D is also incorrect as it is not the exact product of the given numbers.

Correct Answer: D

Rationale: To divide 40.3 by 4.8, we perform the division operation as follows: 40.3 ÷ 4.8 = 8.39583... Rounded to one decimal place, the result is 8.4, which is the correct answer (Choice D). Choice A (0.084) is incorrect as it is the result of dividing 40.3 by 480. Choice B (84) is incorrect as it is the result of multiplying 40.3 by 4.8. Choice C (0.84) is incorrect as it is close to the correct answer but not the precise result of the division.