HESI A2 Math

Correct Answer: C

Rationale: The correct answer is C (27 hours). The truck driver left at 10:00 AM on Tuesday and arrived at 6:00 PM on Wednesday, which is a total of 32 hours. To calculate the driving time, we subtract the time spent overnight (10 hours) from the total time, giving us 22 hours. However, we need to add the 5 hours the driver drove on Tuesday from 10:00 AM to 6:00 PM, totaling 27 hours. Choice A (28 hours) is incorrect because it does not account for the time spent overnight. Choice B (32 hours) is incorrect as it includes the entire duration of departure to arrival without considering the overnight stop. Choice D (15 hours) is incorrect as it does not consider the full duration of the trip.

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.

Correct Answer: B

Rationale: To calculate the profit: 1. Cost per stand = $35 2. Total cost for 7 stands = $35 * 7 = $245 3. Revenue from selling 11 paintings per stand = $5.50 * 11 = $60.50 per stand 4. Total revenue for 7 stands = $60.50 * 7 = $423.50 5. Profit = Total revenue - Total cost = $423.50 - $245 = $178.50 Summary: A: $245 - Incorrect. This is the total cost of the stands, not the profit. B: $178.50 - Correct. Calculated as total revenue minus total cost. C: $175 - Incorrect. Not considering the revenue generated from selling paintings. D: $423.50 - Incorrect. This is the total revenue, not the profit.

Correct Answer: A

Rationale: To solve for x, we can cross multiply: x * 500 = 250 * 3. Simplifying gives x = 750 / 500 = 1.5. Therefore, the correct answer is A. Choice B (25.5) is incorrect as it doesn't match the calculation. Choice C (1500) is incorrect as it is the product of 500 and 3, not the value of x. Choice D (2.5) is incorrect as it doesn't align with the correct calculation.

Correct Answer: D

Rationale: The runner ran for 2 hours and 15 minutes (10:00 - 7:45). Distance = speed x time, so distance = 6 mph x 2.25 hours = 13.5 miles. The correct answer is D: 13.5 miles. Summary: A: 11.5 miles - Incorrect, less than the correct answer. B: 14.5 miles - Incorrect, more than the correct answer. C: 12 miles - Incorrect, less than the correct answer.