HESI A2 Quizlet Math

Correct Answer: A

Rationale: To convert kilometers to meters, we need to multiply by 1000 since there are 1000 meters in 1 kilometer. Therefore, 3 kilometers x 1000 = 3000 meters. This is why choice A (3000 meters) is correct. Choices B, C, and D are incorrect because they do not follow the conversion factor of 1000 meters in 1 kilometer. Choice B (2000 meters) is too low, choice C (3500 meters) is too high, and choice D (2500 meters) is also too low.

Correct Answer: C

Rationale: To find the new dosage after a 20% increase, we first calculate 20% of the original dosage: 20% of 100mg = 0.2 * 100mg = 20mg. Then, we add this to the original dosage: 100mg + 20mg = 120mg. Therefore, the new dosage is 120mg (Choice C). Choices A, B, and D are incorrect because they do not reflect the correct calculation for a 20% increase from the original dosage of 100mg.

Correct Answer: C

Rationale: To find the perimeter of the honeycomb cell, we add the lengths of all six sides, which are 8mm each. Perimeter = 6 * 8mm = 48mm. Choice C (48mm) is correct. Other choices are incorrect because they do not account for the total length of all sides. Option A (32mm) would be the perimeter of a square with sides of 8mm. Option B (40mm) and Option D (56mm) are not the correct total length of all six sides.

Correct Answer: B

Rationale: To find the percentage of income left after spending 15%, you subtract 15% from 100% (total income percentage). So, 100% - 15% = 85% left. Therefore, choice B (85%) is correct. Choices A, C, and D are incorrect as they do not accurately represent the remaining percentage of income after spending.

Correct Answer: C

Rationale: To convert 1000 mg to teaspoons, we use the given conversion factor of 1 g = 1 tsp. First, we convert mg to grams by dividing 1000 mg by 1000 (1 g = 1000 mg), which equals 1 g. Since 1 g is equivalent to 1 tsp according to the conversion factor, the correct answer is 1 tsp. Choice A (.75 tsp) is incorrect because 1 g is equivalent to 1 tsp, not .75 tsp. Choice B (1.5 tsp) is incorrect as 1000 mg equals 1 g, which corresponds to 1 tsp, not 1.5 tsp. Choice D (1.25 tsp) is incorrect because 1000 mg converts to 1 tsp, not 1.25 tsp.