Correct Answer: A

Rationale:
To calculate the number of diapers needed in a year with 6 diaper changes per day, multiply the daily diaper changes (6) by the days in a year (365): 6 x 365 = 2190 diapers required. This calculation ensures an ample supply of diapers for maintaining the infant's hygiene and comfort. The other choices are incorrect because they do not accurately account for the number of diaper changes per day multiplied by the days in a year.
Choice B (2100 diapers) is too low, while choices C (2160 diapers) and D (2140 diapers) are too high based on the calculation. Understanding the frequency and quantity of diaper changes is crucial for supporting the infant's health and well-being.
Therefore, the correct answer is 2190 diapers.

Correct Answer: C

Rationale:
To find the perimeter of a shape with equal sides, you multiply the length of one side by the number of sides. In this case, the honeycomb cell has 6 sides, each measuring 8mm.
Therefore, the perimeter is calculated as perimeter = number of sides * side length = 6 * 8mm = 48mm.

Choices A, B, and D are incorrect because they do not correctly calculate the total length around the honeycomb cell with six sides.

Correct Answer: A

Rationale: Let the width of the rectangle be x cm, and its length be 2x cm. The area of the rectangle is 2x * x = 2x², and the area of the square is 12² = 144 cm². Setting the areas equal gives 2x² = 144. Solving for x gives x = 6. Thus, the width is 6 cm, and the length is 12 cm. The perimeter is 2(6 + 12) = 36 cm.
Therefore, the correct answer is 36 cm.
Choice B, 46 cm, is incorrect because it does not match the calculated perimeter.

Choices C and D are also incorrect as they do not reflect the correct calculation of the rectangle's perimeter.

Correct Answer: B

Rationale:
Rationale:
1. Substitute the given height into the formula for calculating ideal body weight (IBW) for men:
IBW (kg) = 50 + 2.3 * (180 - 150)
IBW (kg) = 50 + 2.3 * 30
IBW (kg) = 50 + 69
IBW (kg) = 119

2.
Therefore, the ideal body weight for a man who is 180cm tall is 119kg.

3. Among the given options, the closest value to 119kg is 71kg (option
B).

4. Hence, the correct answer is
B) 71kg.

Correct Answer: B

Rationale:
To convert 3 1/2 pints of sour cream to cups, knowing that 1 pint equals 2 cups, we multiply 3.5 by 2, resulting in 7 cups.
Therefore, the equivalent amount of sour cream in cups is 7 cups.
Choice A is incorrect as it does not consider the correct conversion factor.
Choice C is incorrect as it does not account for the accurate conversion from pints to cups.
Choice D is incorrect as it underestimates the conversion by not multiplying the pints by the correct factor.