HESI A2 Math

Correct Answer: B

Rationale: To find the total gallons used in a non-leap year, we multiply the daily usage by 365 days. 12 gallons/day x 365 days = 4,380 gallons. Option B is correct. Option A (4,120 gallons) is incorrect because it underestimates the total usage. Option C (3,840 gallons) and Option D (4,350 gallons) are incorrect as they do not accurately calculate the total gallons used in a non-leap year.

Correct Answer: B

Rationale: The correct answer is B (6:00 PM). Taking the medication 12 hours apart from the first dose at 8:00 AM ensures it's evenly spaced throughout the day. 6:00 PM is the most convenient time as it allows for the second dose without disrupting sleep, as it falls after dinner but before bedtime. Choice A (4:00 PM) is too early, which may lead to missing the second dose during the evening. Choices C (8:00 PM) and D (10:00 PM) are too late and might interfere with sleep if taken too close to bedtime. Thus, B is the best option for maintaining the medication schedule effectively.

Correct Answer: D

Rationale: To divide mixed numbers, convert them to improper fractions, then multiply by the reciprocal of the divisor. 4 7/8 = 39/8 1 1/6 = 7/6 (39/8) ÷ (7/6) = (39/8) * (6/7) = 234/56 = 4 5/28 Therefore, the correct answer is D: 4 & 5/28. Choice A is incorrect as it doesn't represent the correct division result. Choices B and C are also incorrect because they do not match the calculated result of 4 5/28.

Correct Answer: A

Rationale: To find Andy's daily mileage, we first calculate Jake's daily mileage: 24.5 miles / 7 days = 3.5 miles/day. Since Andy runs five times as much, he runs 3.5 * 5 = 17.5 miles/day. Therefore, the correct answer is A. Choice B (17.7) is incorrect because it is not the result of the calculation in this scenario. Choice C (16.5) is incorrect as it does not account for Andy running five times as much as Jake. Choice D (18.2) is incorrect because it does not align with the correct calculation based on the information provided.

Correct Answer: B

Rationale: The correct answer is B: 2 tablets. To reach the prescribed 500 mg dosage, two 250 mg tablets should be given. This is because 250 mg + 250 mg = 500 mg, meeting the prescription requirements accurately. Choices A, C, and D are incorrect because they do not add up to the required 500 mg dosage. Option A (3 tablets) would result in 750 mg, option C (4 tablets) would total 1000 mg, and option D (5 tablets) would equal 1250 mg, all exceeding the prescribed amount. Hence, the correct answer is 2 tablets to achieve the precise 500 mg dosage.