Jack is yelling at a decibel level of 70. How much louder is this than his normal speech at 50 decibels?
A)2 times
B)4 times
C)10 times
D)100 times
E)1000 times

Question

Quizplus · Accepted Answer

The decibel is a log scale, and 70 decibels has a power ratio of 10,000,000 whereas 50 decibels has a power ratio of 100,000, 100 times less. In essence, 60 decibels is 10 times louder than 50, and 80 decibels is 1000 times louder than 50.

Jack Is Yelling at a Decibel Level of 70