Round to the tenths place: What is 6.4% of 32?

Correct Answer: B

Rationale: To find 6.4% of 32, first calculate 6.4% as a decimal (0.064) and then multiply it by 32 to get 2.048. When rounding to the tenths place, 2.048 is rounded to 2.1 because the digit after the tenths place is 8, which is equal to or greater than 5. Choice A is incorrect as it does not reflect the accurate calculation. Choices C and D are also incorrect because they do not match the correct result of multiplying 6.4% by 32 and rounding to the tenths place.

Correct Answer: C

Rationale: To find the difference between 15.7 and 9.8, you need to subtract 9.8 from 15.7. This operation results in 5.9. Therefore, the correct answer is 5.9. Choice A, 6.1, is incorrect as it represents the result of subtracting 9.8 from 15.9, not 15.7. Choice B, 8.96, is also incorrect as it is not the correct result of the subtraction provided. Choice D, 4.30, is incorrect as well, as it is not the result of subtracting 9.8 from 15.7.

Correct Answer: B

Rationale: In pharmacology, precision is crucial as even small errors can have significant consequences. This math question assesses a student's ability to perform accurate calculations, a skill essential in medication dosage calculations. The correct answer is B) 9.892. To arrive at this answer, we subtract 10.012 from 0.120, which results in 9.892. This demonstrates the importance of careful attention to decimal placement and the concept of borrowing in subtraction. Option A) 10 is incorrect because subtracting a larger number from a smaller number would not yield a positive integer as the result. Option C) 10.122 is incorrect as it is the sum rather than the difference of the two numbers. Option D) 9.012 is incorrect because it does not account for the change in decimal places when subtracting. Educationally, this question reinforces the need for accuracy and attention to detail in pharmaceutical calculations. It highlights the consequences of errors in medication dosage and emphasizes the importance of mastering basic math skills in pharmacology practice. Students must understand the principles behind decimal subtraction to ensure patient safety.

Correct Answer: D

Rationale: To find the result of multiplying 7.2 by 0.34, multiply these two numbers: 7.2 x 0.34 = 2.448. The correct answer is 2.448. Choice A, 14.12, is incorrect as it seems to be the sum of the two numbers. Choice B, 0.234, is incorrect as it is much smaller than the expected result. Choice C, 7.64, is incorrect as it is the result of adding the two numbers rather than multiplying them.

Correct Answer: C

Rationale: In pharmacology, understanding basic math calculations is crucial for accurate medication dosing. In this question, to find the product of (99)(0.56), we multiply 99 by 0.56. The correct answer is C) 55.44. The correct answer is derived by multiplying 99 by 0.56, resulting in 55.44. This is because when two numbers are multiplied, the product represents the total when one number is added to itself the other number of times. Option A) 99.30 is incorrect because it seems to mistakenly add the two numbers together. Option B) 99.56 is also incorrect as it appears to just present 0.56 as the result. Option D) 199.54 is incorrect because it seems to add the two numbers together rather than multiplying them. Educationally, this question emphasizes the importance of understanding basic arithmetic operations in pharmacology calculations. Nurses and healthcare professionals must be able to perform accurate calculations to administer medications safely and effectively. Mastery of these fundamental math skills is essential for providing quality patient care.