Nursing Metric Conversion

Correct Answer: A

Rationale: Step 1: Convert 0.25 mg to mcg: 0.25 mg * 1000 mcg/mg = 250 mcg Step 2: Compare the converted value (250 mcg) to 250 mcg. Step 3: Since the converted value matches 250 mcg, the statement "0.25 mg is equal to 250 mcg" is TRUE. Summary: - Option B (FALSE) is incorrect because the conversion shows they are equal. - Option C (Sometimes) doesn't apply as the conversion is a precise equivalence. - Option D (None of the above) is incorrect as option A is true based on the conversion.

Correct Answer: C

Rationale: To find the result of multiplying 0.15 by 3, we simply multiply the two numbers together. 0.15 * 3 = 0.45. This is because when you multiply a decimal by a whole number, you multiply the decimal part as usual and then place the decimal point in the product according to the total number of decimal places in the numbers being multiplied. In this case, 0.15 has two decimal places, and 3 is a whole number, so the product is 0.45. Choice A (0.05) is incorrect as it is the result of multiplying 0.15 by 0.33, not 3. Choice B (0.15) is incorrect as it is the original number being multiplied, not the result. Choice D (0.45) is incorrect as it is the same as the correct answer, but repeated in the choices, which usually does not happen in multiple-choice questions.

Correct Answer: C

Rationale: To convert mg to mcg, you multiply by 1000 since 1 mg = 1000 mcg. So, 0.175 mg x 1000 = 175 mcg. Therefore, the correct answer is C: 1750 mcg. Choices A, B, and D are incorrect because they do not correctly convert milligrams to micrograms.

Correct Answer: D

Rationale: To convert millimeters to centimeters, we divide by 10 since there are 10 millimeters in 1 centimeter. Therefore, 25 mm / 10 = 2.5 cm. The correct answer is D: 25 mm, as it represents the initial quantity to be converted. Choices A and B are incorrect as they do not follow the conversion factor. Choice C is incorrect as it represents the original unit rather than the converted unit.

Correct Answer: A

Rationale: The prefix kilo- in the metric system represents the factor of 10^3. Kilo- means one thousand, so when used in conjunction with a base unit, it signifies that the value is being multiplied by 1000. For example, 1 kilometer is equal to 1000 meters. Therefore, the correct answer is A: 10^3. Choice B (10^2) is incorrect because this factor corresponds to the prefix hecto-, not kilo-. Choice C (10^4) is incorrect as it does not align with the meaning of kilo-, which specifically denotes a factor of 10^3. Choice D (10^6) is incorrect as it represents the prefix mega-, which signifies a factor of 10^6.