What is 0.02 as a ratio?

Correct Answer: C

Rationale: To convert 0.02 to a ratio, you need to express it as a fraction. 0.02 is equivalent to 2/100. Simplifying this fraction gives you 1/50. So, the correct ratio for 0.02 is 1:50. Choice A is correct because it accurately represents the ratio of 0.02. Choices B, C, and D are incorrect: B is not the simplified form of 0.02, C simplifies to 1:50, not 2:40, and D is not the correct simplified ratio for 0.02.

Correct Answer: A

Rationale: To convert grams to milligrams, you need to multiply by 1000, not 10000. Therefore, to convert 0.04 grams to milligrams, you multiply 0.04 by 1000, which equals 40 mg. Choice A (40 mg) is the correct answer. Choice B (4 mg) is incorrect as it represents converting 0.004 grams to milligrams. Choice C (400 mg) is incorrect as it is 10 times the correct conversion. Choice D (0.4 mg) is incorrect as it is 10 times smaller than the correct conversion.

Correct Answer: A

Rationale: In this nursing metric conversion question, the number 0.07 needs to be expressed as a fraction. The correct answer is A) 7/100. To understand why this is correct, we need to look at the decimal value 0.07. The number 0.07 can be written as 7/100 because the decimal point is after the tenths place, which is 7, and the denominator represents the place value of the last digit, which is 100 for hundredths. Option B) 1/10 is incorrect because 0.07 is not equal to 1/10. If we convert 1/10 to a decimal, it is 0.1, which is not the same as 0.07. Option C) 1/20 is incorrect because 0.07 is not equivalent to 1/20. 1/20 is equal to 0.05 as a decimal, not 0.07. Option D) 1/50 is incorrect because 0.07 is not equal to 1/50. If we convert 1/50 to a decimal, it is 0.02, which is not the same as 0.07. In a nursing context, understanding how to convert between decimals and fractions is crucial for accurate medication dosing, fluid calculations, and other clinical measurements. Nurses need to have a strong grasp of metric conversions to ensure patient safety and deliver effective care. This question reinforces the importance of precision and accuracy in nursing calculations.

Correct Answer: A

Rationale: To convert milligrams to micrograms, you multiply by 1000, not 10000. Therefore, 0.025 mg equals 25 mcg. Choice B (250 mcg) is incorrect as it incorrectly multiplies by 10000. Choice C (2.5 mcg) is incorrect as it incorrectly divides by 10. Choice D (0.25 mcg) is incorrect as it incorrectly multiplies by 10.

Correct Answer: B

Rationale: To convert liters to milliliters, you need to multiply by 1000 as there are 1000 milliliters in 1 liter. Therefore, when converting 0.5 liters to milliliters, the correct answer is 0.5 x 1000 = 500 ml. Choice A (50 ml) is incorrect because it represents the conversion of 0.05 liters, not 0.5 liters. Choice C (5 ml) is incorrect as it represents the conversion of 0.005 liters. Choice D (0.5 ml) is incorrect as it does not reflect the correct conversion from liters to milliliters.