# the function v(t) =5 (1-2^-o.5) can be used to calculate the volume in decibels

*label*Algebra

*timer*Asked: May 1st, 2015

**Question description**

of a high definition audio receiver when it is powered up, A: compare the volume levels at t=2 seconds. B: if decibels really represent the power of 10 of the sound energy produced how much louder is the receivers volume at 4 seconds than at 2 seconds?