HESI A2 Quizlet Math

Correct Answer: C

Rationale: The correct answer is C: 6 minutes. When the rat's speed is reduced by 50% due to the backpack, it will take twice as long to finish the maze. Therefore, if the rat initially finished the maze in 3 minutes, it will take 6 minutes with the reduced speed. Summary of other choices: A) 3 minutes - Incorrect because the rat's speed is reduced by 50%, so it will take longer than the initial 3 minutes. B) 4 minutes - Incorrect because the reduction in speed by 50% will result in a doubling of the time taken from the initial 3 minutes, making it 6 minutes. D) 1.5 minutes - Incorrect as the reduction in speed will cause the rat to take longer than the initial 3 minutes, not less time.

Correct Answer: B

Rationale: To earn the same amount as Tim in 4 hours, Joe needs to work 4 hours and earn $30/hr x 4 hrs = $120. Joe earns $20/hr, so $120 ÷ $20/hr = 6 hours for Joe to earn the same as Tim. To find how many more hours Joe must work than Tim, we subtract the hours Tim works from Joe's hours: 6 hrs - 4 hrs = 2 hours. Therefore, the correct answer is B: 2 hours. Choices A, C, and D are incorrect because they do not accurately calculate the additional hours Joe needs to work compared to Tim to earn the same amount in 4 hours.

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: 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.