The First Unit Took 10 Hours and the Fourth Unit

question 51

Multiple Choice

The first unit took 10 hours and the fourth unit 8.1 hours. What is the improvement rate?

• A) 99%
• B) 95%
• C) 90%
• D) 15%
• E) none of the above

---

Definitions:

Aging

The process of becoming older, a physiological process that leads to changes in the body over time, including decline in function and increased risk of diseases.

Decibels

A unit of measurement for the intensity of sound, indicating the level of volume.

Membranous Labyrinth

The membranous labyrinth is a fluid-filled network of sacs and tubes in the inner ear involved in hearing and balance.

Stapes

A small stirrup-shaped bone in the middle ear, transmitting vibrations from the incus to the inner ear, crucial for hearing.