Nursing Metric Conversion

Correct Answer: A

Rationale: To convert grams to milligrams, you need to multiply by 1000 since there are 1000 milligrams in a gram. So, 0.04 grams * 1000 = 40 milligrams. Therefore, the correct answer is A: 40 mg. Incorrect choices: B: 4 mg - This is incorrect because it does not account for the conversion factor of 1000. C: 400 mg - This is incorrect as it is a result of multiplying by 10 instead of 1000. D: 0.4 mg - This is incorrect as it is the result of dividing by 10 instead of multiplying by 1000.

Correct Answer: A

Rationale: To convert grams to milligrams, you need to multiply by 1000 since there are 1000 milligrams in a gram. So, 0.04 grams * 1000 = 40 milligrams. Therefore, the correct answer is A: 40 mg. Incorrect choices: B: 4 mg - This is incorrect because it does not account for the conversion factor of 1000. C: 400 mg - This is incorrect as it is a result of multiplying by 10 instead of 1000. D: 0.4 mg - This is incorrect as it is the result of dividing by 10 instead of multiplying by 1000.

Correct Answer: A

Rationale: To convert Celsius to Kelvin, add 273.15. So, for 25°C, add 273.15 to get 298.15 K (Choice A). Choice B (273.15 K) is the freezing point of water in Kelvin, not the correct conversion for 25°C. Choices C (250 K) and D (25 K) are incorrect as they do not follow the correct conversion formula.

Correct Answer: A

Rationale: The correct answer is A: centi. The metric prefix "centi" represents 10^-2, which means one hundredth. This is because "centi" comes from the Latin word for hundred. Therefore, when using this prefix, the base unit is divided by 100. The other choices are incorrect because: B: milli represents 10^-3, which is one thousandth. C: nano represents 10^-9, which is one billionth. D: deci represents 10^-1, which is one-tenth.

Correct Answer: B

Rationale: The correct answer is B: 5280 feet in one mile. This is because 1 mile is equivalent to 5280 feet. This conversion is a standard unit of measurement in the Imperial system. Choice A, 5000 feet, is too low and does not accurately represent the length of a mile. Choice C, 5300 feet, and choice D, 5500 feet, are both higher than the actual value of 5280 feet, making them incorrect. To convert miles to feet, we multiply by the conversion factor of 5280.