Test Your Diaper Knowledge!

Explanation
Each year, approximately 27.4 billion disposable diapers are used in the United States. This number indicates the high demand for disposable diapers, which are commonly used for infants and young children. The large quantity of diapers used highlights the need for proper disposal and recycling methods to minimize environmental impact.

Explanation
In the United Kingdom, Australia, and other commonwealth countries, a diaper is commonly referred to as a "nappy". This term is widely used in these regions to describe the absorbent garment worn by babies to catch and contain their waste. The use of the word "nappy" is a cultural and regional variation, different from the term "diaper" used in other parts of the world.

Explanation
Cloth diapers were first mass produced in 1887. This means that before this year, cloth diapers were likely made individually or in small quantities. The mass production of cloth diapers in 1887 would have made them more accessible and affordable for a larger number of people. This development would have had a significant impact on the use and popularity of cloth diapers as a practical and convenient option for parents.

Explanation
The correct answer is $0.35. This means that on average, each diaper change using disposable diapers costs $0.35.

Explanation
On average, a baby needs to be changed every 1-3 hours. To calculate the number of diapers needed per week, we can assume the baby is changed every 2 hours, which is the midpoint of the given range. In a day, there are 24 hours, so the baby would need to be changed 12 times. Multiply this by 7 days in a week, and the baby would need 84 diapers per week. However, it is common to round up to the nearest multiple of 10 for convenience, so the correct answer is 90 diapers per week.