The agreement of a particular value with the true value is called

Correct Answer: A

Rationale: The correct answer is A: accuracy. Accuracy refers to how close a measured value is to the true value. It indicates the absence of systematic errors. Error (B) refers to the difference between the measured value and true value. Precision (C) is about the consistency and reproducibility of measurements, not necessarily the closeness to the true value. Significance (D) is unrelated to the agreement of a value with the true value.

Correct Answer: C

Rationale: The correct answer is C (3 significant figures). When calculating the perimeter of a rectangle, you add all the sides together. In this case, the perimeter would be 2(36 cm + 83 cm) = 238 cm. The least precise measurement given (83 cm) has 2 significant figures. Therefore, the final answer should be reported with the same number of significant figures as the least precise measurement, which is 3. Summary: A: 1 significant figure is too few. B: 2 significant figures are based on the least precise measurement. D: 4 significant figures are too many as it should match the least precise measurement.

Correct Answer: B

Rationale: The correct answer is B (5 significant figures) because leading zeros are not considered significant. In the number 04560700, the zeros before the 4 are placeholders and do not add to the precision of the number. Therefore, only the digits 4, 5, 6, 0, and 7 are significant. Choice A (4) is incorrect because it does not account for the zeros after the 6. Choice C (7) is incorrect as it counts all the digits including the leading zeros. Choice D (8) is incorrect as it includes all the digits, including non-significant zeros.

Correct Answer: B

Rationale: To determine the significant figures in the difference between 6172 mL and 57 mL, subtract the numbers: 6172 mL - 57 mL = 6115 mL. The answer should have the same number of decimal places as the number with the fewest decimal places in the subtraction, which is 57 mL. Hence, the correct answer is 2 significant figures. Choice A is incorrect because it is too low as it does not account for the 1 in the tens place of 57 mL. Choice C is incorrect as it is too high because the answer does not have that many significant figures. Choice D is incorrect as it also overestimates the number of significant figures in the difference.

Correct Answer: D

Rationale: In pharmacology and health sciences, understanding and working with different units of measurement, such as volume, is crucial for accurate dosing and calculations. In this question, the volume of 781.2 cm³ needs to be expressed in liters. The correct answer is D) 0.7812 L. To convert cubic centimeters (cm³) to liters (L), we need to remember that 1 liter is equal to 1000 cubic centimeters. Therefore, to convert 781.2 cm³ to liters, we divide 781.2 by 1000, which gives us 0.7812 liters. Now let's analyze why the other options are incorrect: A) 781.2 L - This is the same value as the initial volume but in liters, which is incorrect as the conversion requires dividing by 1000. B) 78.12 L - This option is also incorrect as it is a result of misplacing the decimal point in the conversion. C) 7.812 L - Similar to option B, this answer is a miscalculation of the conversion factor. Understanding these conversions is essential for healthcare professionals to ensure accurate medication dosages and formulations. Practicing these conversions helps reinforce mathematical skills necessary for safe and effective pharmacological practice.