By what factor must you increase the intensity of a sound in order to hear a 1.0-dB rise in the sound level?

The right approach will be "1.3". A further explanation is given below.

Explanation:

As we know,

In Decibels, the change in sound volume will be:

=

Now,

According to the question,

⇒

By applying cross multiplication and putting the value of log, we get

⇒

⇒

⇒

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2