(a)

Recall decibels .

Where, is sound of intensity.

Sounds of  decibels or higher can cause noise-induced hearing loss.

Find recall decibels for fire works.

Intensity of fire work is .

Substitute in .

Recall decibels for fire works .

Find recall decibels for jet plane.

Intensity of fire work is .

Substitute in .

Recall decibels for jet plane .

Find recall decibels for ambulance.

Intensity of fire work is .

Substitute in .

Recall decibels for ambulance .

Find recall decibels for rock concert.

Intensity of fire work is .

Substitute in .

Recall decibels for rock concert .

Find recall decibels for headphones.

Intensity of fire work is .

Substitute in .

Recall decibels for headphones .

Find recall decibels for hair dryer.

Intensity of fire work is .

Substitute in .

Recall decibels for hair dryer .

Find the number of hair dryers that produce the same number of decibels produced by a rock concert.

.

hair dryers is that produce the same number of decibels produced by a rock concert.

Find the number of jet planes that produce the same number of decibels produced by a fire work display.

.

jet planes is that produce the same number of decibels produced by fire work display.

(a)

Recall decibels for fire works .

Recall decibels for jet plane .

Recall decibels for ambulance .

Recall decibels for rock concert .

Recall decibels for headphones .

Recall decibels for hair dryer .

(b)

hair dryers is that produce the same number of decibels produced by a rock concert.

(c)

jet planes is that produce the same number of decibels produced by fire work display.