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Change the percent to a decimal: 38% =
- A. 3.8
- B. 0.038
- C. 38
- D. 0.38
Correct Answer: D
Rationale: To convert a percentage to a decimal, you move the decimal point two places to the left. In this case, changing 38% to a decimal involves moving the decimal point two places to the left, resulting in 0.38. Therefore, the correct answer is D.
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Ratio and proportion: 0.8:10 :: x:100
- A. x = 0.8
- B. x = 80
- C. x = 800
- D. x = 8
Correct Answer: D
Rationale: To solve this proportion problem, start by setting up the given ratio 0.8:10 as a fraction, which is 0.8/10. Then, set this fraction equal to the unknown ratio x:100, represented as x/100. Cross multiplying gives us 0.8 * 100 = 10x. Simplifying the equation, we get 80 = 10x. Solving for x, x = 80/10 = 8. Therefore, the correct answer is D, as x equals 8, not 0.8, 80, or 800.
Convert 4/5 to a decimal.
- A. 0.08
- B. 0.375
- C. 1.25
- D. 0.8
Correct Answer: D
Rationale: To convert 4/5 to a decimal, you divide the numerator (4) by the denominator (5): 4 ÷ 5 = 0.8. Therefore, the correct answer is D. Choice A (0.08) is incorrect as it represents 8/100, not 4/5. Choice B (0.375) is incorrect as it is the decimal form of 3/8, not 4/5. Choice C (1.25) is incorrect as it is the decimal form of 5/4, not 4/5.
A patient is consuming a clear diet, and their urinary drainage bag indicates a total output of 1,000 mL in the past 24 hours. The patient's total intake includes 2 8-oz cups of coffee, 1 16-oz serving of clear soup, and 1 pint of water. What is the deficit in milliliters? (Enter a numeric value only. If rounding is necessary, round to the nearest whole number.)
- A. 400
- B. 450
- C. 440
- D. 500
Correct Answer: C
Rationale: To find the total intake, convert each volume to mL: 2 cups of coffee (8 oz each) = 2 x 8 x 29.5735 = 473.176 mL, 1 serving of clear soup (16 oz) = 16 x 29.5735 = 473.176 mL, and 1 pint of water = 473.176 mL. Thus, the total intake is 473.176 + 473.176 + 473.176 = 1,419.528 mL. The deficit is the difference between the total intake and output, which is 1,419.528 - 1,000 = 419.528 mL. When rounded to the nearest whole number, the deficit is 420 mL, making option C, 440, the closest choice.
What is the result of dividing 0.9 by 3?
- A. 3
- B. 30
- C. 0.3
- D. 0.9
Correct Answer: C
Rationale: When dividing 0.9 by 3, you perform the operation 0.9 · 3, which equals 0.3. Dividing a number by another number means finding how many times the divisor can fit into the dividend. In this case, 3 can fit into 0.9 a total of 0.3 times, resulting in the answer of 0.3.
What is 54% of $789.56?
- A. $426.36
- B. $526.38
- C. $363.20
- D. $426.37
Correct Answer: A
Rationale: To calculate 54% of $789.56, you multiply $789.56 by 0.54 (which is the decimal form of 54%). This gives you approximately $426.36. Therefore, the correct answer is A, as it represents 54% of the given amount.