Chapter 4.5, Problem 22E

To determine

(a)

To find:

The decibel level of four speakers together.

To determine

(b)

To find:

An exponential formula giving relative intensity $I$ as a function of decibel level $D$.

To determine

(c)

To find:

The growth factor for relative intensity as an exponential function of decibels.

To determine

(d)

To find:

The effect on relative intensity if the decibel level increases by $3$ units.