Metric Conversions for Nursing

Correct Answer: A

Rationale: To convert milligrams to micrograms, you need to multiply by 1000. So, 0.15 mg x 1000 = 150 mcg. This is why choice A (150 mcg) is correct. Choice B (15 mcg) is incorrect as it doesn't account for the conversion factor. Choice C (1.5 mcg) is incorrect as it is off by a factor of 10. Choice D (1500 mcg) is incorrect as it overestimates the conversion.

Correct Answer: A

Rationale: To convert milligrams to micrograms, you need to multiply by 1000. So, 0.15 mg x 1000 = 150 mcg. This is why choice A (150 mcg) is correct. Choice B (15 mcg) is incorrect as it doesn't account for the conversion factor. Choice C (1.5 mcg) is incorrect as it is off by a factor of 10. Choice D (1500 mcg) is incorrect as it overestimates the conversion.

Correct Answer: A

Rationale: To express 0.004 as a ratio, we need to convert it to a fraction. 0.004 = 4/1000 = 1/250. Therefore, the correct ratio is 1:250. Choice B (4:20) simplifies to 1:5, not equivalent to 1:250. Choice C (2:40) simplifies to 1:20, also incorrect. Choice D (9:20) does not represent the decimal value 0.004. Hence, the correct answer is A.

Correct Answer: A

Rationale: To convert 0.125 to a fraction, we observe that the decimal has 3 decimal places, so the denominator should be 1000. Thus, 0.125 as a fraction is 125/1000, which simplifies to 1/8 by dividing both numerator and denominator by 125. Therefore, the correct answer is A: 1/8. Option B: 1/4 is incorrect because 0.125 is smaller than 0.25. Option C: 1/2 is incorrect as 0.125 is smaller than 0.5. Option D: 1/16 is incorrect as it is too small to represent 0.125.

Correct Answer: A

Rationale: The correct answer is A: centimeter. 'cm' stands for centimeter in the metric system. 'Centi' is a prefix that means one hundredth, so centimeter represents one hundredth of a meter. Choice B, cubic meter, is incorrect because 'cm' does not refer to volume. Choice C, cord, is a unit of measurement for stacked firewood and is not related to 'cm.' Choice D, centi, is a prefix used to indicate one hundredth, but it is not the complete unit itself.