HESI A2 Math Practice

Correct Answer: A

Rationale: To convert quarts to ounces, we know that 1 quart equals 32 ounces. To find the number of ounces in 3 5/8 quarts, we multiply 3 by 32 (96 oz) and add 5/8 of 32 (16 oz). Therefore, 3 5/8 quarts equals 96 + 16 = 112 ounces. The correct answer is 184 oz, which is obtained by multiplying 3 5/8 quarts by 32 (quarts to ounces conversion factor). Other choices are incorrect because they do not correctly apply the conversion factor from quarts to ounces or use incorrect calculations.

Correct Answer: B

Rationale: To find the rate of calories burned per mile, divide the total calories burned (2276) by the total miles run (21.4). So, 2276 / 21.4 = 106.4, which is choice B. This calculation gives us the average rate of calories burned per mile. Choices A, C, and D are incorrect as they do not match the calculated value. Therefore, the correct answer is B based on the calculation method.

Correct Answer: B

Rationale: To convert grams to kilograms, we need to divide by 1000 since there are 1000 grams in 1 kilogram. Therefore, 2000 grams divided by 1000 equals 2 kilograms. Choice B is correct. Choices A, C, and D are incorrect as they do not accurately convert 2000 grams to kilograms. A (20 kg) is 10 times the correct answer, C (5 kg) is incorrect as it is half the correct answer, and D (10 kg) is also incorrect as it is 5 times the correct answer.

Correct Answer: B

Rationale: To calculate the volume needed, we divide the desired dose (1 gram) by the concentration (200 mg/ml) to convert grams to milligrams. 1 gram = 1000 mg. So, 1000 mg / 200 mg/ml = 5 ml. Thus, the correct answer is B: 5 milliliters. Choice A is incorrect because it miscalculates the conversion. Choices C and D are also incorrect as they do not accurately reflect the correct calculation.

Correct Answer: D

Rationale: To convert quarts to ounces, we know that 1 quart is equal to 32 ounces. Therefore, to find out how many ounces are in 2.5 quarts, we multiply 2.5 by 32 which gives us 80 ounces. So, the correct answer is D. Choices A, B, and C are incorrect because they do not accurately represent the conversion from quarts to ounces. Choice A (64 ounces) is the equivalent of 2 quarts, choice B (40 ounces) is the equivalent of 1.25 quarts, and choice C (32 ounces) is the equivalent of 1 quart.