HESI A2 Math

Correct Answer: B

Rationale: The value of pi (?) is approximately 3.14159. When rounded to 2 decimal places, it becomes 3.14. This is because the decimal places after 3.14 are 1 and 5, which are greater than or equal to 5, so the 4 in the hundredths place rounds up to 5. Therefore, choice B (3.14) is the correct answer. Choices A, C, and D are incorrect because they do not accurately represent the value of pi rounded to 2 decimal places.

Correct Answer: A

Rationale: To determine the day with the highest number of admissions in a bar graph, you need to find the tallest bar. The height of each bar represents the number of admissions for a specific day. By identifying the tallest bar, you can easily pinpoint the day with the highest number of admissions. Comparing bar heights (choice B) may be time-consuming and unnecessary. Calculating the average number of admissions per day (choice C) provides an overall view but doesn't directly identify the day with the highest admissions. Subtracting the lowest from the highest number of admissions (choice D) is not needed as the focus is on identifying the highest day, not the range.

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: D

Rationale: The correct answer is D (0.87) because it is the highest number among the options provided. To compare the numbers, we look at the tenths place first. In this case, 0.87 has the highest value in the tenths place, making it the largest number. The other choices, 0.077, 0.777, and 0.08 have lower values in the tenths place, hence they are not as high as 0.87. Therefore, 0.87 is the correct answer as it is the highest number among the given choices.

Correct Answer: C

Rationale: To produce 6 eggs, 2 chickens are needed in 24 hours. So, each chicken produces 3 eggs in 24 hours. To produce 24 eggs in 24 hours, you would need 8 chickens (24 eggs / 3 eggs per chicken = 8 chickens). Therefore, choice C (8) is the correct answer. Other choices are incorrect because they do not consider the ratio of chickens to eggs required accurately. Choice A (48) is too high, choice B (18) is based on an incorrect calculation, and choice D (6) is too low based on the given information.