The loudness, L , of a sound (measured in decibels, dB) is inversely proportional to the square of the distance, d , from the source of the sound.

Question

When a person 12 feet from a jetski, it is 60 decibels loud. How loud is the jetski when the person is 41 feet away?

Answer is in dB

Answer 1

L₁(d₁)² = L₂(d₂)²

60(12)² = L₂(41)²

L2=5.14dB

Answer 2

L₁(d₁)² = L₂(d₂)²

60(12)² = L₂(41)²

Can you solve for L₂ and answer?