70. The same amount is expressed by both measurements in which of the following pairs?
Answer: B
30 mL and 1 fl oz express the same amount.
30 mL is equivalent to 1 fluid ounce, making this pair a correct representation of the same volume measurement.
A) 2.2 mg and 1 lb
2.2 mg and 1 lb are not equivalent; in fact, 1 lb equals approximately 453,592 mg, indicating that this option is not correct.
B) 30 mL and 1 fl oz
30 mL is exactly equal to 1 fluid ounce, confirming that this pair represents the same volume. Therefore, this option is correct.
C) 15 mL and 1 tsp
15 mL is equivalent to 3 teaspoons, not 1 teaspoon. Thus, this option does not express the same amount and is incorrect.
D) 28 oz and 1 g
28 oz is significantly larger than 1 gram, as 1 ounce is approximately 28.35 grams. Therefore, this option is incorrect as well.
Conclusion
The correct answer is B) 30 mL and 1 fl oz, as they represent the same volume measurement. All other options fail to demonstrate equivalence, with A) and D) being vastly different metric conversions and C) misrepresenting the volume of teaspoons.