Nursing Metric Conversions

Correct Answer: B

Rationale: The correct answer is B: derived units. Derived units are formed when base units are combined using mathematical operations. In the case of g/mL for density, grams (g) and milliliters (mL) are base units that are combined to express the derived unit of density. This combination involves division to represent the mass per unit volume. Therefore, derived units are the appropriate term for such combinations. Summary: A: Combined units is a vague term and does not specifically refer to the mathematical combination of base units. C: Base units refer to the fundamental units from which derived units are formed, but they are not the combination of base units. D: Calculated units do involve mathematical operations, but they do not specifically refer to the combination of base units to form derived units.

Correct Answer: C

Rationale: The metric prefix Tera is abbreviated as T- and represents 10^12, which means 1 trillion. Tera is derived from the Greek word for "monster" or "giant." Therefore, the correct numerical value for Tera is 10^12. Choice A (10^6) is incorrect as it represents the metric prefix "Mega." Choice B (10^9) is incorrect as it represents the metric prefix "Giga." Choice D (10^3) is incorrect as it represents the metric prefix "Kilo."

Correct Answer: C

Rationale: The correct answer is C (0.4 inches). To convert from decimals to inches, we know that 1 inch is equal to 1/100 of a foot. So, to convert 0.4 to inches, we multiply 0.4 by 12 (to convert feet to inches), which results in 4.8 inches. Therefore, 0.4 is equal to 4.8 inches. Choice A (0.04 inches) is incorrect because it is one decimal place too low. Choice B (4 inches) is incorrect because it is one decimal place too high. Choice D (40 inches) is incorrect because it is two decimal places too high.

Correct Answer: B

Rationale: The correct answer is B: 0.3 ml. To convert milliliters to milliliters, we don't need to change the value. Therefore, the equivalent of 0.3 milliliters is still 0.3 ml. A: 0.03 ml - This is incorrect as it represents a value that is one-tenth of the original amount. C: 3 ml - This is incorrect as it represents a value that is 10 times greater than the original amount. D: 30 ml - This is incorrect as it represents a value that is 100 times greater than the original amount.

Correct Answer: B

Rationale: To convert liters to milliliters, you need to multiply by 1000 since 1 liter = 1000 milliliters. Therefore, 1.5 liters x 1000 = 1500 milliliters. So, the correct answer is B: 1,500 mL. A is incorrect as it is 10 times less than the correct answer. C is incorrect as it is 10 times less than the correct answer. D is incorrect as it is 100 times more than the correct answer.