The Federal Drug Administration (FDA) recommends that the average person consumes no more than 1300 milligrams, mg of calcium each day. Given 1000 mg = 1 g, if a person has already consumed 0.5 g of calcium in a day, what is the maximum number of mg of calcium they can still consume in that same day?

Rationale

The maximum number of mg of calcium they can still consume in that same day is 800 mg.

This value is obtained by converting the already consumed calcium from grams to milligrams and subtracting it from the recommended daily limit.

A (12.5 mg) YOUR ANSWER

This choice is not correct. It seems to be a result of incorrect conversion of grams to milligrams or misunderstanding of the question. It is far less than the remaining allowance after consuming 0.5 grams (or 500 mg) of calcium.

B (800 mg) CORRECT

This is the correct answer. After consuming 0.5 grams (or 500 mg) of calcium, the maximum a person can still consume is 800 mg. This is obtained by subtracting 500 mg from the FDA's recommended daily limit of 1300 mg.

C (10.8 mg) YOUR ANSWER

This choice is incorrect. It appears to be a result of inappropriate calculations. It is significantly less than the remaining amount of calcium that can be consumed after consuming 0.5 grams (or 500 mg).

D (1299.5 mg) YOUR ANSWER

This choice is incorrect. It seems to be a misinterpretation of the question, as it is just 0.5 mg less than the total daily recommended limit. After already consuming 0.5 grams (or 500 mg) of calcium, the remaining limit would be significantly less than this.

Conclusion

To determine the remaining amount of calcium that can be consumed in a day, the amount already consumed should be subtracted from the recommended daily limit. In this case, after consuming 0.5 grams (or 500 mg) of calcium, a person can still consume 800 mg to meet the FDA's recommended daily limit of 1300 mg without exceeding it.

The maximum number of mg of calcium they can still consume in that same day is 800 mg.

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