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Choose the best answer:

The doctor orders [tex]\(\frac{1}{2}\)[/tex] gr of codeine. How many milligrams is this equivalent to?

A. 16.2 mg
B. 32.4 mg
C. 64.8 mg
D. 97.6 mg

Answer :

Sure! Let's solve the problem step-by-step:

1. Understand the Conversion: We need to convert grains to milligrams. We know that 1 grain (gr) is equivalent to approximately 64.8 milligrams (mg).

2. Identify the Order: The doctor ordered 1/2 grain of codeine.

3. Perform the Conversion: To convert from grains to milligrams, you multiply the number of grains by the conversion factor (since 1 grain equals 64.8 mg).

4. Calculate the Milligrams: Multiply 1/2 grain by 64.8 mg/grain:
[tex]\[
\frac{1}{2} \times 64.8 = 32.4 \, \text{mg}
\][/tex]

5. Find the Best Answer: Compare your calculated result of 32.4 mg with the options given.

The correct answer is b. 32.4 mg.

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