A sound level of 50 decibels is
a) 2.5 times as intense as a sound of 20 decibels.
b) 6.25 times as intense as a sound of 20 decibels.
c) 10 times as intense as a sound of 20 decibels.
d) 100 times as intense as a sound of 20 decibels.
e) 1000 times as intense as a sound of 20 decibels.
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