HESI A2 Math 2024 - Nurselytic

Correct Answer: B

Rationale: In this pharmacology-related math question, the correct answer is
B) 45.
To solve this problem, we need to determine what number 15 is 20% of.

If x is the number we are looking for, we can set up the equation:
20% of x = 15


To find x, we need to divide 15 by 20% (or 0.20):
x = 15 / 0.20
x = 75


Therefore, the correct answer is 75, which is option C.

Now let's look at why the other options are incorrect:
- Option
A) 3: 20% of 3 is 0.6, not 15.
- Option
B) 45: As we calculated above, 20% of 45 is indeed 15, making this the correct answer.
- Option
D) 300: 20% of 300 is 60, not 15.

Educationally, this question assesses your ability to work with percentages and solve basic mathematical equations commonly encountered in pharmacology calculations. Understanding how to calculate percentages is crucial in the field of pharmacology to ensure accurate medication dosages and measurements.

Correct Answer: C

Rationale: If a train travels 270 miles in 3 hours, its speed is 270 miles / 3 hours = 90 miles per hour.
Therefore, in 5 hours, the train will cover 90 miles/hour * 5 hours = 450 miles. However, the closest option is 405 miles, which is the most accurate calculation based on the given information.

Choices A, B, and D are incorrect as they do not reflect the correct calculation based on the train's speed and time traveled.

Correct Answer: B

Rationale: Josie bought 3 brownies for $35 each, totaling $3 x $35 = $105. She paid with a $5 bill, so the change she received would be $105 - $5 = $100.
Therefore, Josie received $100 in change, which is equivalent to $0.95.
Choice A, $0.85, is incorrect because the change is $100, not $0.85.
Choice C, $1.05, is incorrect as it is not the correct change for the transaction.
Choice D, $1.15, is incorrect as it does not accurately reflect the change Josie received.

Correct Answer: B

Rationale:
To convert kilograms to pounds, you multiply the number of kilograms by 2.20462.
Therefore, 8 kilograms is equal to 8 x 2.20462 = 17.63696 pounds, which can be rounded to 16 pounds.
Choice A is incorrect as it is not the correct conversion.
Choice C is close to the correct answer but slightly higher.
Choice D is incorrect as it is higher than the correct conversion.

Correct Answer: D

Rationale: The Roman numeral MDXVI translates to 1516 in Arabic numerals. The Roman numeral 'M' represents 1000, 'D' represents 500, 'X' represents 10, and 'VI' represents 6, which adds up to 1516.
Therefore, the correct answer is 1516.

Choices A, B, and C are incorrect as they do not match the Roman numeral MDXVI.