Question

when two friends talk over lunch, the amplitude of their conversation is about ____ decibels. 20 60 110 85

Explanation:

Normal - conversation between friends over lunch is moderately loud. 20 decibels is very quiet like a whisper, 110 decibels is very loud like a rock concert, 85 decibels is also quite loud like heavy - traffic. A typical conversation is around 60 decibels.

Answer:

B. 60