What is the result of multiplying 0.15 by 60?

Correct Answer: A

Rationale: The correct answer is A: 9. To find the result of multiplying 0.15 by 60, you simply multiply the two numbers together. 0.15 * 60 = 9. This calculation involves basic multiplication. Choices B, C, and D are incorrect as they do not reflect the correct product of 0.15 and 60. Understanding how to multiply decimals and whole numbers is essential in various real-life scenarios such as calculating percentages or adjusting measurements.

Correct Answer: A

Rationale: In this question, the correct answer is A) 250 mcg. To convert milligrams (mg) to micrograms (mcg), we need to remember that 1 mg is equal to 1000 mcg. Therefore, to convert 0.25 mg to mcg, we multiply 0.25 by 1000, which equals 250 mcg. Option B) 25 mcg is incorrect because it does not account for the conversion factor of 1000 between mg and mcg. Option C) 2.5 mcg is incorrect as it is the result of a decimal error in the conversion calculation. Option D) 2500 mcg is incorrect as it mistakenly multiplies by 10 instead of 1000 to convert mg to mcg. Understanding metric conversions is crucial for healthcare professionals, as precise medication dosages often require converting between different units. This skill is also tested in exams like the TEAS to assess a candidate's ability to perform calculations accurately. By mastering these conversions, test-takers can ensure patient safety by administering the correct doses of medication.

Correct Answer: A

Rationale: To convert milligrams (mg) to micrograms (mcg), you need to multiply by 1000 since 1 mg is equal to 1000 mcg. Therefore, 0.3 mg x 1000 = 300 mcg. This conversion is crucial in healthcare to ensure accurate medication dosages. Choice B (30 mcg) is incorrect as it represents the conversion of 0.03 mg to mcg. Choice C (3000 mcg) is incorrect as it is the result of multiplying 0.3 mg by 10 instead of 1000. Choice D (3 mcg) is incorrect as it is the result of not multiplying by 1000 to convert milligrams to micrograms.

Correct Answer: A

Rationale: To convert grams to milligrams, you need to multiply by 1000 as there are 1000 milligrams in one gram. Therefore, 0.4 grams x 1000 = 400 mg. Choice A, 400 mg, is the correct answer. Choices B, C, and D are incorrect because they do not correctly apply the conversion factor of 1000 to convert grams to milligrams.

Correct Answer: A

Rationale: In this question, the correct answer is A) 500 milliliters. To understand this, we need to apply the concept of metric conversions. In the metric system, there are 1000 milliliters in 1 liter. So, to convert liters to milliliters, we need to multiply the given number of liters by 1000. Therefore, to convert 0.5 liters to milliliters, we multiply 0.5 by 1000 which equals 500 milliliters. This conversion is essential in various fields such as science, medicine, and everyday measurements. Now, let's analyze why the other options are incorrect: B) 50 milliliters - This is incorrect because it does not account for the correct conversion factor of 1000 milliliters in 1 liter. C) 5 milliliters - This option is incorrect as it only represents a fraction of the correct conversion. D) 0.5 milliliters - This is incorrect as it directly equates liters to milliliters without applying the correct conversion factor. Understanding metric conversions is crucial in fields where precise measurements are required. It is fundamental for students to grasp these conversions to ensure accuracy in calculations and to facilitate effective communication in various scientific and medical contexts.