The intensity of a sound decreases by a factor of 4. as a result, the sound intensity level decreases a.4db b.6db c.8db d.16db

 Option B is the correct answer.

Explanation:

 We have expression for sound intensity level,

                  , where I is the intensity.

Here new intensity is given by 4I.

So, increase in  sound intensity level

So, option B is the correct answer.

answer: strength i guess

explanation:

the simple machine has three main features. they are:

fulcrum is the center point or pivot point of the machine. effort is input force/ applied force. load is external force/ output.

the keisha 's machine labels are

x : load

y: fulcrum

z: lever