HESI A2 Quizlet Math

Correct Answer: A

Rationale: To find the cost of 6 books, we can use the proportion method. Since 3 books cost $4, 1 book costs $4/3. To find the cost of 6 books, we multiply the cost of 1 book by 6, which gives $8. Therefore, the correct answer is A: $8. The other choices are incorrect because they do not follow the logical calculation based on the initial cost of 3 books and the concept of proportionality.

Correct Answer: A

Rationale: To calculate the number of diapers needed in a year, we multiply the number of times the baby is changed per day (6) by the number of days in a year (365). So, 6 diapers/day x 365 days/year = 2190 diapers (Choice A). This is the correct answer as it accounts for daily changes throughout the year. Choices B, C, and D are incorrect because they do not accurately calculate the total number of diapers needed based on the given information.

Correct Answer: C

Rationale: To convert quarts to ounces, we know that 1 quart equals 32 ounces. This is because 1 quart = 32 fluid ounces. So, when Sarah has 1 quart of milk, she has 32 ounces. Therefore, the correct answer is C: 32 ounces. A: 16 ounces - Incorrect. 1 pint is equal to 16 ounces, not 1 quart. B: 24 ounces - Incorrect. There is no direct conversion relationship between quarts and 24 ounces. D: 48 ounces - Incorrect. 1 gallon is equivalent to 128 ounces, not 1 quart.

Correct Answer: C

Rationale: To convert grams to milligrams, you need to multiply the number of grams by 1000 since there are 1000 milligrams in a gram. Therefore, to convert 63 grams to milligrams, you would calculate 63 x 1000 = 63,000 mg. This is why the correct answer is C. Choice A (630 mg) is incorrect as it does not account for the correct conversion factor of 1000 mg per gram. Choice B (63 mg) is also incorrect as it does not involve the necessary multiplication by 1000. Choice D (63,000 mg) is incorrect as it incorrectly uses a comma in the number, which is not standard in scientific notation.

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.